Single Sylvania 5751 3-mica JHS, Gold, black or gray plate
heiney9
Posts: 25,165
I bought a nice pair off Ebay from a really nice Ebayer who isn't really a tube guy.
1960 USAF Sylvania 3-mica 5751 (gold print) and when I recieved them I noticed he sent one gray plate and one black plate. He didn't disclose it in the ad and I didn't even think to ask since his descriptions and testing procedure seemed thorough enough that he should know that a gray plate and black plate tube are different.
These are the exact same internal structure from the same year and both have square getters. They sound the same and I have read people can only hear very, very subtle differences between the gray and black plate from the same date period.
BUT, I am anal and I want to find a single gray plate or balck plate to match them up. It drives me nuts to see one gray plate and one black plate even though I can't hear a difference.
I was hoping some of the tube guys out there might have a strong testing single out there.
The guy was very nice and apologetic for not knowing. I did ask for and get a fair partial refund equal to about 35% of the final price.
If you've got one, let me know.
H9
Here's a quick and dirty photo
1960 USAF Sylvania 3-mica 5751 (gold print) and when I recieved them I noticed he sent one gray plate and one black plate. He didn't disclose it in the ad and I didn't even think to ask since his descriptions and testing procedure seemed thorough enough that he should know that a gray plate and black plate tube are different.
These are the exact same internal structure from the same year and both have square getters. They sound the same and I have read people can only hear very, very subtle differences between the gray and black plate from the same date period.
BUT, I am anal and I want to find a single gray plate or balck plate to match them up. It drives me nuts to see one gray plate and one black plate even though I can't hear a difference.
I was hoping some of the tube guys out there might have a strong testing single out there.
The guy was very nice and apologetic for not knowing. I did ask for and get a fair partial refund equal to about 35% of the final price.
If you've got one, let me know.
H9
Here's a quick and dirty photo
"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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Reach out to Tom (treitz3). I sold him a pair of BP and was not to happy in the location he was using them in.Speakers: SDA-1C (most all the goodies)
Preamp: Joule Electra LA-150 MKII SE
Amp: Wright WPA 50-50 EAT KT88s
Analog: Marantz TT-15S1 MBS Glider SL| Wright WPP100C Amperex BB 6er5 and 7316 & WPM-100 SUT
Digital: Mac mini 2.3GHz dual-core i5 8g RAM 1.5 TB HDD Music Server Amarra (memory play) - USB - W4S DAC 2
Cables: Mits S3 IC and Spk cables| PS Audio PCs
