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Discussion in 'Let's Talk Vintage' started by redfish, Apr 6, 2021.
My eyes aren't that good, I can't make it out.
wow thats cool ... great detective work
Screenshot 2021-04-10 At 09.38.52 by redfish posted Apr 10, 2021 at 9:41 AM
I might have to take it out again to get a good pic ... but this seems to show TG9624 athough the 'G' is a bit too blurry to tell for sure on this pic
Thanks! I actually remember that post as I was an avid PP member. These are pictures of my SA212 transformers. Are the TG numbers the model and the H numbers the date code? Sorry, Redfish...not intending to hijack your tread!
Yes, H2 would be 1972 if I figured it out correctly. Don't see many 50s with the original PT, does it run hot?
Not possible if it's "Earthed" (grounded) properly.
And it is.....
Red, can you read off any letter codes on the Brown cap please, they will be capitols XXX.
I have a curious finding, will post later.
which brown cap Sean?
The .05uf 1000v Hunts cap next to the Bulgin and P/T
I cant read it on any of my pics or video - would have to open her up again - will post what I find when I get round to opening up again
H Y? (date code)
I could be way off base here, but through using modern 1,000V (& greater) capacitors, my understanding is that an X rated capacitor will fail closed, or "short" while a Y rated capacitor will fail open. Not at all sure when these designations came into use, but is it possible the H Y designation has something to do with this?
My JMP50 has this same 1,000V Hunts capacitor mounted between the HT fuse holder & ground. Cheers
I believe the three letter sequence to be a manufacture date code. A similar type date code was used on their electrolytic capacitors. So, if true then I'd expect the code to be either 'H YN' or 'H YD'.
Great info. Now I need to check my own Partridge codes
As TAZIN said, it's a date code. I checked the one in my JTM50 as it's out of the cabinet and it's H TU.
Yes it's a date code, Stu is it a Hunts or an Erie, is there a type space between those letters or are they equi spaced.
Hunts. It's spaced like that: H TU, so tempting to see the H as the year, which would make it week 46 of 1962. It could be week 24 of 1966... I haven't yet found one with a middle digit that would confirm which way around to read these. I've only come across H and Y as the first letter in Marshalls.
Interesting, yes the spacing makes it confusing, but 62 could be from the first batch ( they probably didn't use that many) or more likely 66 I think, let's see what others come up with.