Preamp Tubes? - Who, What, When, Where, Why, and How? - Page 16

RiverRatt · 06-12-2009, 11:17 AM

Quote:

Originally Posted by solarburnDSL50

So with my current line up and the RFT sitting in V1 I'm hearing my Marshall get ballzier in the gain department. Its a darker tube with pronounced lows including lower mids where the ballzee gain comes from. The highs are present though so it doesn't dull up or sound flat.

That sounds like what I need. I'm trying to darken up my DSL a bit, too. I've thought about trying the treble bleed cap mod on the red channel, but I can't get up the nerve to do it. Any other suggestions besides the RFT?

solarburnDSL50 · 06-12-2009, 01:46 PM

Quote:

Originally Posted by RiverRatt

That sounds like what I need. I'm trying to darken up my DSL a bit, too. I've thought about trying the treble bleed cap mod on the red channel, but I can't get up the nerve to do it. Any other suggestions besides the RFT?

For $40 try it and find out. YES this will do it. Only need 1 of them and put it in V1. Seriously. If not you can turn this tube around easily and make your money back.

What preamp tubes are you running and what power tubes RR?

Try this setting and tell me how it sounds on yours: Volume 3
Lead 1
Presence-3
treble-4
Mid-3 or 4
Bass-5.5
Gain-6 or 7

Bass boost in mid shift out.

Lead 2: Volume 3
Presence-2
Treble-4
mid- 5
Bass-5.5
Gain-7

Bass boost out and mid shift out.

Running the mids lower will thicken it up. Don't scoop just lower and see if it warms up some by thickening. Mess around with it.

RiverRatt · 06-12-2009, 02:37 PM

That's really close to the settings I'm using now. I usually leave the Lead 2 channel's gain on around 4 or 5 unless I need a really thick lead tone. With the gain on 10 and that RCA 12BZ7 in V2, it's like having an instant "Red House" setting.

Using the bridge pickup on my LP with the tone on 10 works great for the crunch channel, but switching to the Lead2 channel I have to roll the tone control off to about 3 to tame the treble.

Did you get the RFT off eBay? That's the only place I've found them.

MartyStrat54 · 06-12-2009, 02:42 PM

Quote:

Originally Posted by RiverRatt

That's really close to the settings I'm using now. I usually leave the Lead 2 channel's gain on around 4 or 5 unless I need a really thick lead tone. With the gain on 10 and that RCA 12BZ7 in V2, it's like having an instant "Red House" setting.

Using the bridge pickup on my LP with the tone on 10 works great for the crunch channel, but switching to the Lead2 channel I have to roll the tone control off to about 3 to tame the treble.

Did you get the RFT off eBay? That's the only place I've found them.

Ratt, let me know how that BZ7 holds up in your amp. You may have got yourself a good one. They have really long plates and they tend to rattle.

BTW, Joe bought the tube from a dealer, not EBAY.

Marty

RiverRatt · 06-12-2009, 04:00 PM

I think the 12BZ7's will be fine. I picked up two of them from Tube Depot. They list them as NOS various brands, and I got lucky with two great-sounding RCA tubes. I've tried both in V2 and they sound identical and are very quiet. I've been scouring the internet for more information about them - someone suggested using one in the PI spot, so now I'm going to have to try that.

I still haven't tried a BZ7 in the Blackheart Little Giant. I'm playing out with it for the next couple of weeks and I don't want to take a chance until I get it back in the house for awhile. I may end up selling it along with that big batch of tubes and some pedals and see if I can swing a Vox Night Train. I've got GAS for that amp pretty bad. It looks like it'll cover all the ground the Blackheart does and then some.

solarburnDSL50 · 06-12-2009, 04:14 PM

Quote:

Originally Posted by RiverRatt

That's really close to the settings I'm using now. I usually leave the Lead 2 channel's gain on around 4 or 5 unless I need a really thick lead tone. With the gain on 10 and that RCA 12BZ7 in V2, it's like having an instant "Red House" setting.

Using the bridge pickup on my LP with the tone on 10 works great for the crunch channel, but switching to the Lead2 channel I have to roll the tone control off to about 3 to tame the treble.

Did you get the RFT off eBay? That's the only place I've found them.

I'll pm you.

solarburnDSL50 · 06-12-2009, 04:35 PM

Quote:

Originally Posted by MartyStrat54

Ratt, let me know how that BZ7 holds up in your amp. You may have got yourself a good one. They have really long plates and they tend to rattle.

BTW, Joe bought the tube from a dealer, not EBAY.

Marty

Marty you have any more RCA 12AX7A's? I'd like to get a couple more of them on hand. Good tube.

I found 1 dealer that has Anos RCA 12AX7A's and he wants $48 for one and they are used but test like new. Otherwise I'm not seeing much of a selection from my places as far as these go.

MartyStrat54 · 06-12-2009, 05:56 PM

Quote:

Originally Posted by solarburnDSL50

Marty you have any more RCA 12AX7A's? I'd like to get a couple more of them on hand. Good tube.

I found 1 dealer that has Anos RCA 12AX7A's and he wants $48 for one and they are used but test like new. Otherwise I'm not seeing much of a selection from my places as far as these go.

I know I have some, but I'll have to look on the tubes themselves as I only have "12AX7" written on the boxes and they could be "A's" or "WA's." When I find some I will PeeMmm you.

Marty

solarburnDSL50 · 06-12-2009, 06:19 PM

Quote:

Originally Posted by MartyStrat54

I know I have some, but I'll have to look on the tubes themselves as I only have "12AX7" written on the boxes and they could be "A's" or "WA's." When I find some I will PeeMmm you.

Marty

Righteous my friend! Must you Pee on my Mmm?

MartyStrat54 · 06-12-2009, 06:41 PM

Just got contacted by the Moderator and he said this thread has gotten too long and that he is going to have to start charging us for the upkeep on this thread.

You got any ideas on how we can pay for this?

PSYCH!

This thread is huge. Almost 6,000 viewers. Holy Horse Manure, Robin!

Well done my friends...well done.

Marty

solarburnDSL50 · 06-12-2009, 06:46 PM

Quote:

Originally Posted by MartyStrat54

Just got contacted by the Moderator and he said this thread has gotten too long and that he is going to have to start charging us for the upkeep on this thread.

You got any ideas on how we can pay for this?

PSYCH!

This thread is huge. Almost 6,000 viewers. Holy Horse Manure, Robin!

Well done my friends...well done.

Marty

joshuaaewallen · 06-12-2009, 07:23 PM

Quote:

Originally Posted by MartyStrat54

Just got contacted by the Moderator and he said this thread has gotten too long and that he is going to have to start charging us for the upkeep on this thread.

You got any ideas on how we can pay for this?

PSYCH!

This thread is huge. Almost 6,000 viewers. Holy Horse Manure, Robin!

Well done my friends...well done.

Marty

Ouch! Ya actually almost had me goin' there Marty! Whew... It looks like our little thread has really grown a lot from it's humble beginnings. Kudos guys!

So my wife was out running around today and came across a yard sale... She decided to stop, and wound up bringing something home for me...

Click Here For The Webshots Album Containing All The Pics Thus Far...

I basically just walked in the door from work, so I can't tell ya much about it, but decided to snap a few quick photos to share with ya'll... Looks like there's one or two tubes that are probably 12AX7's, the others I'm not sure about yet. And... This thing still works! I tuned in the local AM news station and it came in just fine. Far out, eh?

Any thoughts on this item from ya'll out there in forum-land?

Ok... 'Nuff O that. I need to get my stinky hind into the shower so I can be fresh as daisies for the old lady!

Ciao!

MartyStrat54 · 06-12-2009, 08:26 PM

From the size of it and what I have seen, it is a single-ended 6BQ5 (EL84) amp with either one or two 12AX7's. Hell, if it's working, I'd clean the old girl up and use it for the garage (he he he).

Leave it up to the wife to score what I had talked about, that is a radio/record player and not a TV. She's out driving home and "BAM," she scores.

(Tried looking at the other pic's and it was downloading real slow and then froze, so I didn't see the other pic's. Man those tubes a really dusty.)

PS-Is this part solid state and tube? You should have a bevy of radio tubes as well, unless they made it SS. Let me know.

Marty

MartyStrat54 · 06-12-2009, 08:35 PM

Those power tubes could be 7199's as well. I love those two little output trannies. They're really cute. Good size power tranny, probably was providing 285V B+, plus 5V to the rectifier tube and 6.3V for the heaters.

How much did she pay for this?

Now I'm curious.

Martino

joshuaaewallen · 06-12-2009, 08:56 PM

Marty McFly is da bomb!

$15 for this critter.

There are separate sets of tubes in two different "bays" within the cabinet... Looks like one for the radio and one for the record player... but it is missing the actual record player/turn-table component (pictures 4 & 6 above are the one set of tubes, and picture 5 is the other set).

RiverRatt · 06-12-2009, 11:18 PM

Great score, Josh! Dontcha almost hate to rip into them when they're that pretty? If those are 6BQ5's, you've got almost enough stuff there to build a killer 18-watt clone. How many preamp tubes are in the radio tuner in picture #5? The ones in the shields look a little too tall for 12AX7's. Could be 6FQ7's. Keep us posted. Inquiring minds want to know!

MartyStrat54 · 06-12-2009, 11:32 PM

Quote:

Originally Posted by RiverRatt

Great score, Josh! Dontcha almost hate to rip into them when they're that pretty? If those are 6BQ5's, you've got almost enough stuff there to build a killer 18-watt clone. How many preamp tubes are in the radio tuner in picture #5? The ones in the shields look a little too tall for 12AX7's. Could be 6FQ7's. Keep us posted. Inquiring minds want to know!

Ahh, but you forgot this is "stereo." The amp has twin output trannies and everything is split. Rules out an 18-watt clone. If it had been a mono amp, I would have drove up to Minnesota to pick it up from Josh (or his wife).

I mean I guess you could hand wire an 18-watter out of some of the parts. You would still need to pick up some other parts, like a solid 30 watt OPT and a standard chassis. Be fun to build.

Marty

joshuaaewallen · 06-13-2009, 09:46 AM

Here's better pics of the tubes I pulled this morning from that HiFi. One is Marked 12AX7SA, the rest have varying model numbers that I am not familiar with. (RCA 5y3GT, 7189A, 6AU6A, 6BE6, 6EZ8, and 6GH8)

Click Here For The Webshots Album Containing All The Pics Thus Far...

Marty... Or anyone else... If you happen to know what these other tubes are, or are used for, please let me know. I'd love to find them a good home. (I'm not in it for the $$$, just looking for good tubes that I can use)

If anyone wants to get a look at the BIG hi-res photos, just let me know which one's and I'll email you.

cooljuk · 06-13-2009, 10:10 AM

The RCA 5Y3GT is a full wave rectifier. Not worth much, but it's a nice tube if it's in good shape.

solarburnDSL50 · 06-13-2009, 11:07 AM

Quote:

Originally Posted by RiverRatt

That sounds like what I need. I'm trying to darken up my DSL a bit, too. I've thought about trying the treble bleed cap mod on the red channel, but I can't get up the nerve to do it. Any other suggestions besides the RFT?

Here is a little summary right up describing the RFT 12AX7 I found surf'n last night:

ECC83/R.F.T
German valve that I have seen also branded Brimar, Siemens & Telefunken. This tube was also used for a long period by Marshall. The valve has
a rich bass response with great drive. Very low in microphonics due to thick glass envelope. The valve also distorts earlier than the U.S.A types.
The valve does show less treble response than the U.S.A types which lends the valve to be used in a more rock style set up. The rich harmonic
distortion make this a great valve in Marshall. Boogie and Vox amps. It showed rich sustain with plenty of bass crunch. Mid range was clear and
detailed. Defiantly for the rockers and blues players.

Here is the link where I got this from:

12ax7

RiverRatt · 06-13-2009, 11:56 AM

Quote:

Originally Posted by joshuaaewallen

One is Marked 12AX7SA, the rest have varying model numbers that I am not familiar with. (RCA 5y3GT, 7189, AU6A, 6BE6, 6EZ8, and 6GH8)

The 7189 is IIRC a military or high-voltage 6BQ5/EL84. The 12AX7 is a Sylvania - you're picking up part of the letters USA which they always put under the model number. I have no idea about the rest except the rectifier.

RiverRatt · 06-13-2009, 12:13 PM

Quote:

Originally Posted by solarburnDSL50

Here is a little summary right up describing the RFT 12AX7 I found surf'n last night:12ax7

Yes, thanks solarburn. I believe I hit that same page yesterday. I had a FIIF day at the office yesterday (F___ It, It's Friday) and I did a lot of surfing. Everything I've read says that the RFT is magic in a Marshall. Thanks for pointing me toward them. I'm going to have to pick up at least a couple.

Quote:

Ahh, but you forgot this is "stereo." The amp has twin output trannies and everything is split. Rules out an 18-watt clone. If it had been a mono amp, I would have drove up to Minnesota to pick it up from Josh (or his wife).

I mean I guess you could hand wire an 18-watter out of some of the parts. You would still need to pick up some other parts, like a solid 30 watt OPT and a standard chassis. Be fun to build.

Marty

I knew it would be some work, and that the OT's would be too weak, but a couple of scores like that and you should have enough carbon comp resistors and some of the caps. I'm surprised it didn't have an EZ81 rectifier. And yes, it would be fun to build. I'm still about $200 away from having enough stuff. The ELL80 and EZ81 and the two Sonotone ECC83's I sent came from a very similar radio/Hi-Fi.

solarburnDSL50 · 06-13-2009, 01:00 PM

Quote:

Originally Posted by RiverRatt

Yes, thanks solarburn. I believe I hit that same page yesterday. I had a FIIF day at the office yesterday (F___ It, It's Friday) and I did a lot of surfing. Everything I've read says that the RFT is magic in a Marshall. Thanks for pointing me toward them. I'm going to have to pick up at least a couple.

I knew it would be some work, and that the OT's would be too weak, but a couple of scores like that and you should have enough carbon comp resistors and some of the caps. I'm surprised it didn't have an EZ81 rectifier. And yes, it would be fun to build. I'm still about $200 away from having enough stuff. The ELL80 and EZ81 and the two Sonotone ECC83's I sent came from a very similar radio/Hi-Fi.

You got it brother. Enough on that then. Moving right along...hehe.

MartyStrat54 · 06-13-2009, 03:33 PM

Quote:

Originally Posted by RiverRatt

The 7189 is IIRC a military or high-voltage 6BQ5/EL84. The 12AX7 is a Sylvania - you're picking up part of the letters USA which they always put under the model number. I have no idea about the rest except the rectifier.

I screwed up earlier and called the 7189's, 7199's. (Missed it by that much!)

I had taken a second look and realized they were too tall to be 6BQ5's.

And yes, the GE is actually a Sylvania. The logo has the "USA" and the dots below it. By the late 50's and early 60's, a lot of tube production was already slowing down because of the transistor. Furthermore, plants were built in Japan to bring the cost of tube making down. It was common for one company to buy 300,000 12AX7's from another company and relabel them. However, the actual manufacturer always wanted to leave their permanent mark on the tube. I know a bit about it, but there's a lot more to the story. At the very end of tube production, some tubes were relabeled with up to five different part numbers. Think about that for a moment.

Marty

RiverRatt · 06-13-2009, 08:06 PM

To quote John Lennon, "I've got blisters on my fingers!"

I just took a big step toward the tone I've been looking for. I finally got up the nerve to clip the treble bleed cap on the tube board, thanks to this page. At first, I thought the difference was subtle. Then, I noticed that I didn't have to compensate for the spiky high frequencies when switching from crunch to ultra-gain. I played around with the gain level on the ultra channel. I noticed pretty quickly that this channel sounded a lot more like a hot-rodded JCM800 than before. When my wife left for a while this evening, I cranked the gain up to 10 and turned the amp up to piss-off-the-neighbors loud. I ended up playing for about 2 hours. With the 12BZ7 and the treble bleed cap out of the picture, this thing is a fire breather! It absolutely NAILS the Appetite for Destruction tone, as well as that classic Billy Gibbons melt-your-face tone. I'm just waiting for that RFT 12AX7 to put the icing on the cake. Of course, a good Les Paul R8 plus some Wolfetone Dr. Vintage pickups helps. I'm wanting to get the Strat out and try it, but I don't think my fingers can take it. This thread absolutely is the best thing that's happened since I got my Marshall. Thanks, guys!!!!!

joshuaaewallen · 06-14-2009, 11:25 AM

Quote:

Originally Posted by RiverRatt

The 7189 is IIRC a military or high-voltage 6BQ5/EL84. The 12AX7 is a Sylvania - you're picking up part of the letters USA which they always put under the model number. I have no idea about the rest except the rectifier.

So the 7189 in interchangeable w/ an EL84?

Quote:

Originally Posted by MartyStrat54

I screwed up earlier and called the 7189's, 7199's. (Missed it by that much!)

I had taken a second look and realized they were too tall to be 6BQ5's.

And yes, the GE is actually a Sylvania. The logo has the "USA" and the dots below it. By the late 50's and early 60's, a lot of tube production was already slowing down because of the transistor. Furthermore, plants were built in Japan to bring the cost of tube making down. It was common for one company to buy 300,000 12AX7's from another company and relabel them. However, the actual manufacturer always wanted to leave their permanent mark on the tube. I know a bit about it, but there's a lot more to the story. At the very end of tube production, some tubes were relabeled with up to five different part numbers. Think about that for a moment.

Marty

Ha! I don't know how I missed that! Must have been an angle/lighting thing combined w/ the "USA" being partially covered by the "General Electric" writing... Anyhoo... When I went back and looked at the tube it sure seems plain as day now!

solarburnDSL50 · 06-14-2009, 11:45 AM

Quote:

Originally Posted by RiverRatt

To quote John Lennon, "I've got blisters on my fingers!"

I just took a big step toward the tone I've been looking for. I finally got up the nerve to clip the treble bleed cap on the tube board, thanks to this page. At first, I thought the difference was subtle. Then, I noticed that I didn't have to compensate for the spiky high frequencies when switching from crunch to ultra-gain. I played around with the gain level on the ultra channel. I noticed pretty quickly that this channel sounded a lot more like a hot-rodded JCM800 than before. When my wife left for a while this evening, I cranked the gain up to 10 and turned the amp up to piss-off-the-neighbors loud. I ended up playing for about 2 hours. With the 12BZ7 and the treble bleed cap out of the picture, this thing is a fire breather! It absolutely NAILS the Appetite for Destruction tone, as well as that classic Billy Gibbons melt-your-face tone. I'm just waiting for that RFT 12AX7 to put the icing on the cake. Of course, a good Les Paul R8 plus some Wolfetone Dr. Vintage pickups helps. I'm wanting to get the Strat out and try it, but I don't think my fingers can take it. This thread absolutely is the best thing that's happened since I got my Marshall. Thanks, guys!!!!!

Way to go on the mod man. Glad its something you can really use. When you use your crunch channel are you just using the amp or are you putting any OD or clean boost to it? Where a bouts do you have the gain set on it? I'm just curious.

I so need a Les Paul...

RiverRatt · 06-14-2009, 12:39 PM

Quote:

Originally Posted by solarburnDSL50

Way to go on the mod man. Glad its something you can really use. When you use your crunch channel are you just using the amp or are you putting any OD or clean boost to it? Where a bouts do you have the gain set on it? I'm just curious.

I so need a Les Paul...

Everybody should have at least one Les Paul! I think it's a law in Tennessee.

The gain on the crunch channel depends on how loud I'm able to play. At home, around 8. If I'm playing out, around 6 or 7. I don't usually use a pedal in front of the Marshall, but I've got a Bad Monkey for my little 15 watt that I sometimes use. I picked up an Electro Harmonix Dr. Q at a friend's shop a couple of months ago that I love. I know it's not an OD pedal, but it can really shape the input... a bit like an auto wah, or you can use it as a notch filter and get a pretty convincing Mick Ronson Ziggy Stardust tone.

Josh, this turned up on a Google search - there's a lot of info about 7189's on the web. I didn't realize there was a 7189A with a different pinout until I read this. Check out the prices on those things!! What brand are yours?

http://www.vacuumtubes.com/6bq5.html

joshuaaewallen · 06-14-2009, 12:52 PM

Quote:

Originally Posted by RiverRatt

... Josh, this turned up on a Google search - there's a lot of info about 7189's on the web. I didn't realize there was a 7189A with a different pinout until I read this. Check out the prices on those things!! What brand are yours?

6BQ5 / EL84 Vacuum Tube List

Holy Cow! That's serious $$$. I'll bet those are NOS... Whereas mine are definitely used. Looks like they can be had a bit cheaper on evilBay... 7189A, Electronics, Collectibles items on eBay.com.

I may have to contract with my man Marty to do some tube testing for me and start selling off any that are good... Granted I'm not looking to make tons of $$$ or anything, but a few buck to help with my "guitar gear fund" is always useful...

RiverRatt · 06-14-2009, 12:54 PM

Here's another page that has more info on the 7189A - sounds like they could be interchangeable in the right circuit.

7189A Tube Differences

06-12-2009, 02:37 PM	#453 (permalink)
RiverRatt Senior Member Join Date: May 2008 Location: Between Memphis and Nashville Posts: 517	Re: Preamp Tubes? - Who, What, When, Where, Why, and How? That's really close to the settings I'm using now. I usually leave the Lead 2 channel's gain on around 4 or 5 unless I need a really thick lead tone. With the gain on 10 and that RCA 12BZ7 in V2, it's like having an instant "Red House" setting. Using the bridge pickup on my LP with the tone on 10 works great for the crunch channel, but switching to the Lead2 channel I have to roll the tone control off to about 3 to tame the treble. Did you get the RFT off eBay? That's the only place I've found them.

06-12-2009, 04:00 PM	#455 (permalink)
RiverRatt Senior Member Join Date: May 2008 Location: Between Memphis and Nashville Posts: 517	Re: Preamp Tubes? - Who, What, When, Where, Why, and How? I think the 12BZ7's will be fine. I picked up two of them from Tube Depot. They list them as NOS various brands, and I got lucky with two great-sounding RCA tubes. I've tried both in V2 and they sound identical and are very quiet. I've been scouring the internet for more information about them - someone suggested using one in the PI spot, so now I'm going to have to try that. I still haven't tried a BZ7 in the Blackheart Little Giant. I'm playing out with it for the next couple of weeks and I don't want to take a chance until I get it back in the house for awhile. I may end up selling it along with that big batch of tubes and some pedals and see if I can swing a Vox Night Train. I've got GAS for that amp pretty bad. It looks like it'll cover all the ground the Blackheart does and then some.

06-12-2009, 06:41 PM	#460 (permalink)
MartyStrat54 Senior Member Join Date: Feb 2009 Location: Formerly Phoenix, now north of KC Posts: 2,583	Re: Preamp Tubes? - Who, What, When, Where, Why, and How? Just got contacted by the Moderator and he said this thread has gotten too long and that he is going to have to start charging us for the upkeep on this thread. You got any ideas on how we can pay for this? PSYCH! This thread is huge. Almost 6,000 viewers. Holy Horse Manure, Robin! Well done my friends...well done. Marty __________________ MARTY 2009 Gibson Explorer-Hell Raising Machine 1989 Fender Strat Plus USA 2008 Fender Tele USA 2004 Schecter Elite w/DiMarzio's TSL100 with custom 4x12 cab. TSL122 with Man 'O War Speakers. TSL602 #1 with JBL D123 Speakers and 602 #2 with Altec 417 Speakers. "Oh so sweet my friends." DSL401 #1 with Red Fang Speaker and 401 #2 with JBL D123 Speaker. Tubes: Let's just say they are NOS that kick ass.

06-12-2009, 08:26 PM	#463 (permalink)
MartyStrat54 Senior Member Join Date: Feb 2009 Location: Formerly Phoenix, now north of KC Posts: 2,583	Re: Preamp Tubes? - Who, What, When, Where, Why, and How? From the size of it and what I have seen, it is a single-ended 6BQ5 (EL84) amp with either one or two 12AX7's. Hell, if it's working, I'd clean the old girl up and use it for the garage (he he he). Leave it up to the wife to score what I had talked about, that is a radio/record player and not a TV. She's out driving home and "BAM," she scores. (Tried looking at the other pic's and it was downloading real slow and then froze, so I didn't see the other pic's. Man those tubes a really dusty.) PS-Is this part solid state and tube? You should have a bevy of radio tubes as well, unless they made it SS. Let me know. Marty __________________ MARTY 2009 Gibson Explorer-Hell Raising Machine 1989 Fender Strat Plus USA 2008 Fender Tele USA 2004 Schecter Elite w/DiMarzio's TSL100 with custom 4x12 cab. TSL122 with Man 'O War Speakers. TSL602 #1 with JBL D123 Speakers and 602 #2 with Altec 417 Speakers. "Oh so sweet my friends." DSL401 #1 with Red Fang Speaker and 401 #2 with JBL D123 Speaker. Tubes: Let's just say they are NOS that kick ass.

06-12-2009, 08:35 PM	#464 (permalink)
MartyStrat54 Senior Member Join Date: Feb 2009 Location: Formerly Phoenix, now north of KC Posts: 2,583	Re: Preamp Tubes? - Who, What, When, Where, Why, and How? Those power tubes could be 7199's as well. I love those two little output trannies. They're really cute. Good size power tranny, probably was providing 285V B+, plus 5V to the rectifier tube and 6.3V for the heaters. How much did she pay for this? Now I'm curious. Martino __________________ MARTY 2009 Gibson Explorer-Hell Raising Machine 1989 Fender Strat Plus USA 2008 Fender Tele USA 2004 Schecter Elite w/DiMarzio's TSL100 with custom 4x12 cab. TSL122 with Man 'O War Speakers. TSL602 #1 with JBL D123 Speakers and 602 #2 with Altec 417 Speakers. "Oh so sweet my friends." DSL401 #1 with Red Fang Speaker and 401 #2 with JBL D123 Speaker. Tubes: Let's just say they are NOS that kick ass.

06-12-2009, 08:56 PM	#465 (permalink)
joshuaaewallen Senior Member Join Date: Jan 2009 Location: Minnesota Posts: 372	Re: Preamp Tubes? - Who, What, When, Where, Why, and How? Marty McFly is da bomb! $15 for this critter. There are separate sets of tubes in two different "bays" within the cabinet... Looks like one for the radio and one for the record player... but it is missing the actual record player/turn-table component (pictures 4 & 6 above are the one set of tubes, and picture 5 is the other set). __________________ Josh 2004 PRS Custom 24 10 Top Dean Caddy w/ Bare Knuckles Nail Bombs (This One's For Sale, Just Let Me Know If You Are Interested) 1999 Marshall JCM 2000 TSL 122 - Power Tubes: JJ EL34L's - Assorted New & Vintage pre-amp tubes... I like to roll... HardWire DL-8 Delay/Looper http://irkinempire.spaces.live.com/ "... When you do things right, people won't be sure you've done anything at all." - Futurama

06-12-2009, 11:18 PM	#466 (permalink)
RiverRatt Senior Member Join Date: May 2008 Location: Between Memphis and Nashville Posts: 517	Re: Preamp Tubes? - Who, What, When, Where, Why, and How? Great score, Josh! Dontcha almost hate to rip into them when they're that pretty? If those are 6BQ5's, you've got almost enough stuff there to build a killer 18-watt clone. How many preamp tubes are in the radio tuner in picture #5? The ones in the shields look a little too tall for 12AX7's. Could be 6FQ7's. Keep us posted. Inquiring minds want to know!

06-13-2009, 09:46 AM	#468 (permalink)
joshuaaewallen Senior Member Join Date: Jan 2009 Location: Minnesota Posts: 372	Re: Preamp Tubes? - Yardsale HiFi Tubes: Here's better pics of the tubes I pulled this morning from that HiFi. One is Marked 12AX7SA, the rest have varying model numbers that I am not familiar with. (RCA 5y3GT, 7189A, 6AU6A, 6BE6, 6EZ8, and 6GH8) Click Here For The Webshots Album Containing All The Pics Thus Far... Marty... Or anyone else... If you happen to know what these other tubes are, or are used for, please let me know. I'd love to find them a good home. (I'm not in it for the $$$, just looking for good tubes that I can use) If anyone wants to get a look at the BIG hi-res photos, just let me know which one's and I'll email you. __________________ Josh 2004 PRS Custom 24 10 Top Dean Caddy w/ Bare Knuckles Nail Bombs (This One's For Sale, Just Let Me Know If You Are Interested) 1999 Marshall JCM 2000 TSL 122 - Power Tubes: JJ EL34L's - Assorted New & Vintage pre-amp tubes... I like to roll... HardWire DL-8 Delay/Looper http://irkinempire.spaces.live.com/ "... When you do things right, people won't be sure you've done anything at all." - Futurama Last edited by joshuaaewallen; 06-14-2009 at 11:56 PM.

06-13-2009, 10:10 AM	#469 (permalink)
cooljuk Senior Member Join Date: Mar 2009 Posts: 135	Re: Preamp Tubes? - Who, What, When, Where, Why, and How? The RCA 5Y3GT is a full wave rectifier. Not worth much, but it's a nice tube if it's in good shape.

06-13-2009, 08:06 PM	#475 (permalink)
RiverRatt Senior Member Join Date: May 2008 Location: Between Memphis and Nashville Posts: 517	Re: Preamp Tubes? - Who, What, When, Where, Why, and How? To quote John Lennon, "I've got blisters on my fingers!" I just took a big step toward the tone I've been looking for. I finally got up the nerve to clip the treble bleed cap on the tube board, thanks to this page. At first, I thought the difference was subtle. Then, I noticed that I didn't have to compensate for the spiky high frequencies when switching from crunch to ultra-gain. I played around with the gain level on the ultra channel. I noticed pretty quickly that this channel sounded a lot more like a hot-rodded JCM800 than before. When my wife left for a while this evening, I cranked the gain up to 10 and turned the amp up to piss-off-the-neighbors loud. I ended up playing for about 2 hours. With the 12BZ7 and the treble bleed cap out of the picture, this thing is a fire breather! It absolutely NAILS the Appetite for Destruction tone, as well as that classic Billy Gibbons melt-your-face tone. I'm just waiting for that RFT 12AX7 to put the icing on the cake. Of course, a good Les Paul R8 plus some Wolfetone Dr. Vintage pickups helps. I'm wanting to get the Strat out and try it, but I don't think my fingers can take it. This thread absolutely is the best thing that's happened since I got my Marshall. Thanks, guys!!!!!

06-14-2009, 12:54 PM	#480 (permalink)
RiverRatt Senior Member Join Date: May 2008 Location: Between Memphis and Nashville Posts: 517	Re: Preamp Tubes? - Who, What, When, Where, Why, and How? Here's another page that has more info on the 7189A - sounds like they could be interchangeable in the right circuit. 7189A Tube Differences

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