The Reference 6J5 Thread (L63, 6C5, 12J5, 6P5, etc.)
Jan 15, 2021 at 1:38 PM Post #1,186 of 4,201
Hopefully this is just a general question and you are not considering buying from BangyBang. They are on the list of sellers to avoid:

https://www.head-fi.org/threads/over-priced-tubes.920115/post-16063045

I'm sure others have more experience with this question than I do, but I had the same question recently when looking at 12AU7 tubes, where there are many IEC and Mullard versions that seem to be the same, if not identical.

Oh definitely did not buy from BangyBang. Purchased a 5-pack of these IEC Mullard 12J5GTs for just around $40, almost the same as BangyBang's asking price for one tube.
 
Jan 15, 2021 at 2:54 PM Post #1,187 of 4,201
Jan 15, 2021 at 3:39 PM Post #1,188 of 4,201
Smells like a group buy that was organized somewhere other than here, or maybe somebody who thinks they can turn a profit re-selling them in pairs elsewhere. I can't imagine an individual collector would see the straight glass version as desirable enough to horde this many, but hording isn't exactly a logic based activity either so.......
 
Jan 15, 2021 at 4:42 PM Post #1,189 of 4,201
Smells like a group buy that was organized somewhere other than here, or maybe somebody who thinks they can turn a profit re-selling them in pairs elsewhere. I can't imagine an individual collector would see the straight glass version as desirable enough to horde this many, but hording isn't exactly a logic based activity either so.......
Those straight glass (with metal base) are very desirable, and going up in price it seems. Check out the price of the equivalent B65 that Langrex has. Of course the 12 volt version B36 is cheaper.
 
Jan 15, 2021 at 4:56 PM Post #1,190 of 4,201
Jan 15, 2021 at 5:53 PM Post #1,191 of 4,201
Those straight glass (with metal base) are very desirable, and going up in price it seems. Check out the price of the equivalent B65 that Langrex has. Of course the 12 volt version B36 is cheaper.
I don't get why the straight glass is more desirable than the ST glass ones are, unless there are construction/plant origin differences. I guess if the straight glass with the Osram sticker are literally just one of the B65 plates inside I can see why people would really want them.
 
Jan 16, 2021 at 3:40 AM Post #1,192 of 4,201
Seems like another case of a mass disappearance of tubes from Langrex like the Brimar 6C5G from earlier in this thread.. Perhaps a dealer is watching this thread??


I don't get why the straight glass is more desirable than the ST glass ones are, unless there are construction/plant origin differences. I guess if the straight glass with the Osram sticker are literally just one of the B65 plates inside I can see why people would really want them.
I have tried both the straight glass and the ST shaped 6J5G and definitely prefer the ST shape much more. The straight glass is more forward sounding and has a drier tone, with perhaps more detail. I think the high demand is indeed due to its similarities to the B65, but I have never tried one or B36 to confirm. Regardless, 100+GBP is above and beyond the market price and what I personally think they should be worth.
 
Jan 16, 2021 at 12:51 PM Post #1,193 of 4,201
I’m trying to determine the manufacture of this pair. Does anyone here recognize the build? There are no codes of any kind.
 

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Jan 16, 2021 at 5:24 PM Post #1,194 of 4,201
Seems like another case of a mass disappearance of tubes from Langrex like the Brimar 6C5G from earlier in this thread.. Perhaps a dealer is watching this thread??



I have tried both the straight glass and the ST shaped 6J5G and definitely prefer the ST shape much more. The straight glass is more forward sounding and has a drier tone, with perhaps more detail. I think the high demand is indeed due to its similarities to the B65, but I have never tried one or B36 to confirm. Regardless, 100+GBP is above and beyond the market price and what I personally think they should be worth.
Have you tried the metal base L63? I do agree these sold for significantly more than others I've seen.
 
Jan 16, 2021 at 11:48 PM Post #1,196 of 4,201
Have you tried the metal base L63? I do agree these sold for significantly more than others I've seen.
I have tried the metal base grey glass gold Osram labelled L63 and that is my impression of them above. I think I even prefer the brown base straight glass L63 over the metal base, it has a similar presentation but better detail and more balanced tonality in my opinion. If anyone has both the metal base L63 and the metal base B65/B36 that would be a very worthwhile comparison!

It's a Canadian manufactured version of the RCA design to my eyes. Perhaps one or two others could chime in and confirm/debunk.
I would agree, Marconi Canada made and branded their own tubes but seems to have gotten their parts from US companies RCA/GE/Sylvania etc. I have 'GE Canada' made 6SN7 that have identical internals to Sylvania that likely were made by Marconi. There was also the case of 'Marconi 6SN7GTB' tubes with the sought after 3-hole T-shaped Sylvania plates but different getter; I think the consensus was that the internals were bought from Sylvania then assembled (in Canada), with bases subsequently put on by Marconi. I definitely think my Canadian 6SN7 sound different to any US Sylvania 6SN7, and I wonder if these 6J5G have any similarities to RCA.
 
Jan 17, 2021 at 11:20 AM Post #1,197 of 4,201
I would agree, Marconi Canada made and branded their own tubes but seems to have gotten their parts from US companies RCA/GE/Sylvania etc. I have 'GE Canada' made 6SN7 that have identical internals to Sylvania that likely were made by Marconi. There was also the case of 'Marconi 6SN7GTB' tubes with the sought after 3-hole T-shaped Sylvania plates but different getter; I think the consensus was that the internals were bought from Sylvania then assembled (in Canada), with bases subsequently put on by Marconi. I definitely think my Canadian 6SN7 sound different to any US Sylvania 6SN7, and I wonder if these 6J5G have any similarities to RCA.

What I've read over the years is very similar, although some suggest that RCA was the primary parts supplier. Could be dependent on the tube type as well, with Sylvania the primary supplier for some types and RCA some others. I've never found anything totally definitive one way or the other. The only thing that does seem definitive is that the UK Marconi (a later iteration of MOV) and Canadian Marconi are entirely different animals.
 
Jan 17, 2021 at 8:46 PM Post #1,198 of 4,201
NOS Brimar 6C5G popped up today. Get them while you can...

https://www.ebay.com/itm/313236390777
Wow, only 1 left already. And less than I paid from Langrex. Hopefully they went to people in this thread and not to BangyBang who will charge way more for them later.

Speaking of BangyBang...was browsing eBay and saw these Brimar 6C5Gs listed among the usual suspects and thought they looked familiar - Vintage Brimar 6C5G/W1528 Octal Triode Antique Radio Tube Valve- BangyBang Tubes | eBay. Does anyone recall the original price compared to what they're being resold for?

I still can't find any info on the IEC Mullard 12J5 tubes, but they'll arrive early this week, so hopefully will be a pleasant surprise!
 
Jan 17, 2021 at 10:05 PM Post #1,199 of 4,201
Speaking of BangyBang...was browsing eBay and saw these Brimar 6C5Gs listed among the usual suspects and thought they looked familiar - Vintage Brimar 6C5G/W1528 Octal Triode Antique Radio Tube Valve- BangyBang Tubes | eBay. Does anyone recall the original price compared to what they're being resold for?

I still can't find any info on the IEC Mullard 12J5 tubes, but they'll arrive early this week, so hopefully will be a pleasant surprise!

I paid $25 per tube from Langrex for the Brimar 6C5G's when they had them. They didn't come in original boxes though, certainly nothing like the one in the BangyBang photo. Mine also don't have that red Brimar text on the base.
 
Jan 18, 2021 at 7:51 AM Post #1,200 of 4,201

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