G.Kleinschmidt said:
Hitachi SB655A/2SD675A, 22MHz-100W TO3s, can be found in some Technics components.
Regular B653/B654/B655/D673/D674/D675 can still be sourced new, sometimes for $1.5. But they has lower Ft, Bwana.
Same goes for 14MHz NEC 2SB600/2SD555 TO3s, favored by both Mr Bongiorno and Madrigal ML untill the duo went obsolete, used in several Technics receivers.
For some reason Technics always fancied using exotic stuff, especially NEC candy.
Speaking of candy, apparently Toshiba initially bought the RET technology from Fujitsu, later released their own 2SA1095/2SC2565 ringemitter development to compete with Sankens LAPT devices.
Attachments
Jacco,
Wasn't that exotic in japan itself... remember NEC was "Solid State Mfg No. 2" then - worldwide .
(MOF the then head of Semicon later Research at NEC has been one of ye olde Shockley's assistants.)
Hi Glen,
got the boards thanks. Can I ask if this subminiature tube could be used?
(from the wonderful Frank's Electron Tube Pages)
http://tubes.mkdw.net/sheets/137/6/6112.pdf
sp
got the boards thanks. Can I ask if this subminiature tube could be used?
(from the wonderful Frank's Electron Tube Pages)
http://tubes.mkdw.net/sheets/137/6/6112.pdf
sp
Jacco,
Your knowledge of Transistors and designs always has me saying....Wow!
I know food and that chef quality in you is at least as good!
My wife and I will save our miles to come over for dinner eventually! What wine should we bring!
Regards//Keith
Your knowledge of Transistors and designs always has me saying....Wow!
I know food and that chef quality in you is at least as good!
My wife and I will save our miles to come over for dinner eventually! What wine should we bring!
Regards//Keith
You can try if you check the pin config first.stoolpigeon said:
jacco vermeulen said:
Jacco is in the entertainment business 😀. The one where you use the least numbers of letters on your answer LOL 😉
The underline is that he wants you to learn the cheerful escapade of reading.
Actually, no joke, he means that the amplification factor of 70 isn't in par with the suggested ECC83, which have the rate 100u.
Maybe you allready noticed the difference in the datasheets ?
stoolpigeon said:
It should do. Just pay attention to the pinouts and the heater supply requirements.
Cheers,
Glen
I can understand why you settle for a lower mu tube, but just how do you intend to solder them straight in ?
(Michaelson Fidelity seems to like the 6112. Btw, downloading and reading a pdf of a +50 year old datasheet feels kinda special)
(Michaelson Fidelity seems to like the 6112. Btw, downloading and reading a pdf of a +50 year old datasheet feels kinda special)
Package arrived, the boards look even better in real than on screen.
(might as well stuff myself and some sandwiches in a box for a trip to Oz)
(might as well stuff myself and some sandwiches in a box for a trip to Oz)
jacco vermeulen said:
Cool. The others should start receiving them about now too.
Anyone have a board loaded and up and runnning yet?
Got my cards yesterday evening 🙂
I see I have a problem though.
Where to find tubecockets that fit ? I have two types bought from Tubetown i Germany and one old NOS type but none of them fits the PCB. My sockets are to large. They have to large diameter on the pins circle.
Anyone else?
I see I have a problem though.
Where to find tubecockets that fit ? I have two types bought from Tubetown i Germany and one old NOS type but none of them fits the PCB. My sockets are to large. They have to large diameter on the pins circle.
Anyone else?
Damn... I knew the german post office isn't fast (since they got privatized)...but hearing about "delivery in the evening" does make me really jealous...
Try seller "audioantik" on ebay (germany), or search goggle for "ask jan first" (die wuestens).
(...reminder I couldn't check that though)
Radioman62 said:
Did you buy B9A sockets intended for PCB mounting? These usually have a pin circle diameter a fair bit larger than that of the valve.
I designed the board for standard chassis mount sockets with wire twist solder lugs, not the PCB mount types.
The board also isn't designed to accept the solder lugs of the socket, you have to solder tinned cu wire extensions onto the lugs, as I showed in post 130:
http://www.diyaudio.com/forums/showthread.php?postid=1481895#post1481895
Incidentally, I got my sockets from Jaycar:
http://www.jaycar.com.au/productResults.asp?FORM=KEYWORD
Cheers,
Glen
These are the two types from "audioantik" (ebay).
I hope they will fit (Got 4 of each)(smaller type fits pins in 18mm circle straight)
Should be easy to buy from sweden.
I hope they will fit (Got 4 of each)(smaller type fits pins in 18mm circle straight)
Should be easy to buy from sweden.
Hello vrun
I'm sure no one will fit of the ones you have on picture.
The pin diameter is just 14 mm on the PCB card. The pin circle diameter on the tube itself is 12 mm, so an extension socket as jacco mentioned won't fit either.
Yes Glen, I probably have one B9A type socket intended for PCB mounting. It measures 20mm pin circle diameter. The other types is for PCB as well but they all look different and the pin circle on the smallest one i have, the one vrun refer to on the first picture, is 18mm diameter.
OK, I do my own fix so I can use the sockets I have. Problem and case solved as far as I am concerned 🙂
I'm sure no one will fit of the ones you have on picture.
The pin diameter is just 14 mm on the PCB card. The pin circle diameter on the tube itself is 12 mm, so an extension socket as jacco mentioned won't fit either.
Yes Glen, I probably have one B9A type socket intended for PCB mounting. It measures 20mm pin circle diameter. The other types is for PCB as well but they all look different and the pin circle on the smallest one i have, the one vrun refer to on the first picture, is 18mm diameter.
OK, I do my own fix so I can use the sockets I have. Problem and case solved as far as I am concerned 🙂
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