have a pair of 5k:8 OPTs lying around.. suggest me something to build?

[d3aPentode]

looking for something fun to build here.. any suggestions?

 

[Ty_Bower]

Push pull? Single ended? How much current is the primary rated to carry?

 

[d3aPentode]

oops sorry for omitting the details,

single ended, 60-65ma is rated

it sounds quite limited as to what this can be used for.. no? 🙁

 

[TheGimp]

6P1P, EL84, 6V6, 6L6 Pentode or triode strapped.

 

[planet10]

pictures?

RH84 is good for doing a decent sounding amp with small OPTs.

dave

 

[Brit01]

red with envy!

Just lying around?? I can't even get hold of toroidal trannies here.

😉

 

[d3aPentode]

pictures?

RH84 is good for doing a decent sounding amp with small OPTs.

dave

red with envy!

Just lying around?? I can't even get hold of toroidal trannies here.

😉

yup..lying around
forgot which amplifier i salvaged them from a long time ago
so was just wondering if there could be anything i could be making out of it

i think their last application was with a 2A3

 

[d3aPentode]

any suggestions is welcome, schematics or links are also appreciated

do pardon my lack of experience in this subject.. i'm a biologist in profession, whom had always been interested in tinkering around with the distant subject of electronics

 

[Globulator]

oops sorry for omitting the details,

single ended, 60-65ma is rated

it sounds quite limited as to what this can be used for.. no? 🙁

Obviously you'll need to buy some GU50 tubes and sockets.
2 if you want a traditional SE, 4 if you want to get funky and make an SRPP/SEPP parafeed on. Yves has a good circuit you could base it on!

Those OPTs are not limited at all, you luck, lucky man!

 

[Ty_Bower]

i think their last application was with a 2A3

Do you like circuit boards? You could try a Get Set Go.

diytube.com :: View topic - diytube get*set*go

 

[Brit01]

What about a simple KT88 :

http://diyaudioprojects.com/Tubes/KT88/

You can swap the KT88 tubes with EL34/6CA7 and the 6N1P with a 6DJ8/ECC88/E88CC.

 

[planet10]

I have lots of OPTs lying around, but am envious of lundahl.

With 60 mA you have a fair range of possibilities.

RH84 might be underkill, but don't sell it short. Simple too. Lots of traffic on it here.

dave

 

[planet10]

file:///C:/Documents%20and%20Settings/sg0892121/My%20Documents/Valve%20stuff/KT88%20Single%20Ended%20%28SE%29%20Tube%20Amplifier.htm

That link is to a file on your HD... only of use to you. You'll have to attach the map to a post.

dave

 

[Brit01]

whoops!! yep didn't realise. Lol.

Here it is:

KT88 Single Ended (SE) Tube Amplifier

 

[TheGimp]

You might need to back off on the bias slightly if you run the KT-88s. Easy enough to do.

 

[Ty_Bower]

Another fun project might be Gary Kaufman's DC coupled 6EM7.

6EM7 DC Coupled Triode Tube Amplifier

 

[simon2a3]

I really liked that 6EM7 DC circuit when I built it - sounds remarkably good and it's easy to build. The valves are cheap but it's only about a watt output.

Gordon Rankin's Bugle is another worth trying - 45s are nice and output's nearly 2W IIRC.
http://www.wavelengthaudio.com/bugle.pdf

 

[Golana]

Post 15 is a Kegger SE6v6/sl7, which 90% done with. Just need to finish wiring.
With nice iron like yours, I'd be building something where I could play with the UL taps.
SE 6v6? - AudioKarma.org Home Audio Stereo Discussion Forums

 

[d3aPentode]

thanks for the suggestions, the el84 looks nice and simple to build without too much heat generated

in single end, how many watts would i expect? thanks! 🙂

 

[boywonder]

How about Tubelab's Simple SE or the Tublelab SE? Pick up the PCB from Tubelab George and you're half done.......

Tubelab Home

http://www.diyaudio.com/forums/tubelab/