6V6 Output? - Page 2

Psychobiker · 28th March 2008, 02:15 PM

Lo and behold!!That's what I was originally building until I found the Boozhound Labs one which utilises a (sonically) far superior 12SN7

Ty_Bower · 28th March 2008, 04:49 PM

Quote:

Originally posted by Tom Bavis
A 5K transformer will work nicely at a different operating point, say about 250V / 50 mA...

Is that a general rule of thumb? If the OPT offers a lower impedance load than you want, lower the voltage and raise the current? Does it work for push-pull as well? I guess I should be able to deduce the answer for myself by drawing load lines, but...

I ask because I have a set of 6.6K OPT (Hammond 1620) which I'm using with 6BQ5 tubes. My B+ is rather high (nearly 385V, K to A), so I run them at a lower current to keep the overall dissipation within limits. But, at low frequencies (20~50 Hz) they distort at relatively low power levels (3~4 watts out). I suspect it's probably just a limitation of these inexpensive OPTs, but if I thought they would perform better at a lower voltage & higher current, it might be worth the trouble to try.

Psychobiker · 28th March 2008, 05:11 PM

mine *should* run 250V...with 5k OPT.

Will let you know!

hotbottle · 28th March 2008, 11:45 PM

I think you'll like the 6V6 triode strapped SE sound. When you get it up and running, you can also play around with popping in other tubes, like 6L6, or even 6550.

Yes, they'll run at a low operating point, but sometimes the sound can be surprising. I really liked 6550s running this way.

nafanja · 29th March 2008, 12:07 AM

If You stay the pair 6V6 in Paralel - but transformer with 100ma(Io) it's will be better for damping factor.You will get may be 0.5 Ohm for 4 Ohm output.
If You stay ecc81 or analog - it's will be better too.
Better for puls rate.
If You hear it - give me know.

Psychobiker · 29th March 2008, 04:23 AM

As soon as she's built properly!! (about 3 wwwkes, given college etc)

L

29th March 2008, 12:07 AM	#15
nafanja diyAudio Member Join Date: Mar 2008	about 6V6 If You stay the pair 6V6 in Paralel - but transformer with 100ma(Io) it's will be better for damping factor.You will get may be 0.5 Ohm for 4 Ohm output. If You stay ecc81 or analog - it's will be better too. Better for puls rate. If You hear it - give me know. __________________ Shippment: $:Europe: 1,2 x (16+2,45 x Weight(kg)) N. Amerika & Asia: 1,2 x (10 +4,9 x Weight(kg))

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28th March 2008, 02:15 PM	#11
Psychobiker diyAudio Member Join Date: Jul 2005 Location: Montréal QC	Lo and behold!!That's what I was originally building until I found the Boozhound Labs one which utilises a (sonically) far superior 12SN7

28th March 2008, 05:11 PM	#13
Psychobiker diyAudio Member Join Date: Jul 2005 Location: Montréal QC	mine should run 250V...with 5k OPT. Will let you know!

28th March 2008, 11:45 PM	#14
hotbottle diyAudio Member Join Date: Mar 2008	I think you'll like the 6V6 triode strapped SE sound. When you get it up and running, you can also play around with popping in other tubes, like 6L6, or even 6550. Yes, they'll run at a low operating point, but sometimes the sound can be surprising. I really liked 6550s running this way.

29th March 2008, 04:23 AM	#16
Psychobiker diyAudio Member Join Date: Jul 2005 Location: Montréal QC	As soon as she's built properly!! (about 3 wwwkes, given college etc) L

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