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05/01/25 at 12:49:22

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Tesla 7DJ8: Plant 32 vs. Plant 37 (Read 4104 times)

piezoman Ex Member	Tesla 7DJ8: Plant 32 vs. Plant 37 07/25/21 at 14:10:40 Has anyone compared these Czech tubes, mfd. in plant 32 [Vrchlabi] vs mfd. in plant 37 [Trinec]?
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piezoman Ex Member	plant 32 Reply #1 - 07/25/21 at 15:49:57 plant 32.
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piezoman Ex Member	plant 37 Reply #2 - 07/25/21 at 15:52:50 plant 37.
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CAJames

Seasoned Member

"I've run every
red light on memory
lane."

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Re: Tesla 7DJ8: Plant 32 vs. Plant 37
Reply #3 - 07/25/21 at 18:21:41

So I'm a big fan of Tesla tubes in general. I have Tesla ECC88, E88CC and PCC88 from both factories and I haven't found any systematic differences between the factories. Rather there are differences in type (it looks like one picture is a ECC88 and the other is a PCC88) and esp. year. Tesla has a "house sound" that tends toward the detailed and transparent rather than rich and full. But in my experience (and in my gear) the E88CCs are more so, the PCC88 and ECC88s less. Another one of my favorites is 6CC42 that can be adapted to a 6DJ8 type and it is (again in my gear) a little richer, fuller and more forward sounding while still maintaining a lot of detail.

IMO Tesla is a real bargain for quality NOS European tubes and well worth investigating to draw your own conclusions.

[FOOBAR2000 | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E
STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos
Omega SAM , Hifiman Arya, Audeze LCD-XC

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CAJames Seasoned Member "I've run every red light on memory lane." Posts: 2447	Re: Tesla 7DJ8: Plant 32 vs. Plant 37 Reply #4 - 07/25/21 at 19:40:11 PS. FYI/FWIW Tesla uses a 2 letter date code. Older is usually better, but there is no real order to the code: https://tubes-store.com/article_info.php?articles_id=5&osCsid=eo846unup2jphh0f2p...
Back to top	[FOOBAR2000 \| Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos Omega SAM , Hifiman Arya, Audeze LCD-XC IP Logged

Geno Seasoned Member Without music, life would be a mistake. Posts: 2219	Re: Tesla 7DJ8: Plant 32 vs. Plant 37 Reply #5 - 07/25/21 at 21:51:12 CA, Is there a particular variant of the 6cc42 that you like? I may give some a run. Thanks, Geno
Back to top	(2)SE84UFO(Balanced Monoblocs) OR Sansui AU222 Cambrge Audio CXN(ModWright) Crown XLS-1002 SL1210MK5(KAB Mods) Soundsm Aida MKll cart • Darlingt.Labs MP8b Otari MX5050-Bii2 R2R ZLC Power Cond Lii Audio PT-10 OR F-12 OR Betsy Alnico 8"/ W-15 in Open Baffle IP Logged

CAJames Seasoned Member "I've run every red light on memory lane." Posts: 2447	Re: Tesla 7DJ8: Plant 32 vs. Plant 37 Reply #6 - 07/25/21 at 22:04:55 Hey Geno, I started with the the "plain" 6CC42. I liked them so much I eventually sprang for the older pinched waist, crossed swords version which is even better, but rather pricey. IIRC you like the GE 5670 and the Tesla is similar, but I think the sound is even more vivid and dynamic.
Back to top	[FOOBAR2000 \| Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos Omega SAM , Hifiman Arya, Audeze LCD-XC IP Logged

Geno Seasoned Member Without music, life would be a mistake. Posts: 2219	Re: Tesla 7DJ8: Plant 32 vs. Plant 37 Reply #7 - 07/25/21 at 22:24:31 Thanks man! I’ll see what I can find.
Back to top	(2)SE84UFO(Balanced Monoblocs) OR Sansui AU222 Cambrge Audio CXN(ModWright) Crown XLS-1002 SL1210MK5(KAB Mods) Soundsm Aida MKll cart • Darlingt.Labs MP8b Otari MX5050-Bii2 R2R ZLC Power Cond Lii Audio PT-10 OR F-12 OR Betsy Alnico 8"/ W-15 in Open Baffle IP Logged

piezoman Ex Member	Re: Tesla 7DJ8: Plant 32 vs. Plant 37 Reply #8 - 07/25/21 at 23:05:25 Hey James, thanks for your thoughts. Yeah, lol, was in a hurry when posting the pics, wanted to show the plant nbrs.
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