6V6 Output?

Psychobiker · 18th February 2008, 01:03 AM

Some say the 6V6, as per the Boozhounds build (6SN7 driver) will yield only 3W, yet I hear 12-odd watts bandered about, or is this only the GTA?

L

Andrewbee · 18th February 2008, 01:52 AM

12 watts would be in push pull, ~ 3 watts in se and ~5 or so watts se with separate screen supply or ul.

sorenj07 · 18th February 2008, 01:53 AM

triode SE will probably be around 3 watts.
ultra-linear SE will probably be around 4 watts.
pentode SE will probably be around 5 watts.
triode PP will probably be around 6 watts.
ultra-linear PP will probably be around 12 watts.
pentode PP will probably be around 15 watts.

also depends on things like bias point, OPT primary impedance, etc. etc.

Psychobiker · 18th February 2008, 12:46 PM

Cheers, upon further digesting the data sheet, it seems with 315V plate, triode strapped, it'll yield about 5.5W, given an 8k5 load. I'm taking it this can be made of a 5k OPT, and 3.5k resistor in series - surely the valve would 'see' 8k5?

L

Robert McLean · 18th February 2008, 02:11 PM

Dont put the 3.5K resistor in series with the transformer. Yes, the tube will see something like 8.5K, but thats not the point. The 3.5K resistor is going to drop over 100 volts due to plate current and completely change the operating point. It will also dissipate about 40% of whatever ac output ower is produced, so considering power reduction due to 5k ac load line vs 8.5K, different operating point, and 40% loss in the resistor, you might only get 1 or 2 watts out. (guesstimate, precise numbers would need to be calculated)

You would be better off just using the 5K transformer.

Best of all of course is the 8.5K transformer.

Tom Bavis · 18th February 2008, 02:23 PM

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

Psychobiker · 18th February 2008, 10:03 PM

AFAIK, thats what the boozhound is calculated at - 250V.

Any recommendations on OPTs? Budget of appx $150. I've heard Frag Jan Zuerst's are quite good,?

L

stalker · 19th February 2008, 02:13 PM

A single 6v6 in triode 1.5 Watts maximum. No way you can get 3 Watts. Try el84, a little more power for less distortion. Anyway this is what simSE says. Simulation tube program by Broskie.

Psychobiker · 19th February 2008, 02:17 PM

At what voltage tho?

L

krzanik · 28th March 2008, 02:06 PM

I recently built a 6V6GT Single Ended amp that sounds very good. I have compared it to other single ended amps of known wattage and it has to have about 5 watts output. The guys on this forum helped me tweek the curcuit and it sounds great with absolutely no hum. I would highly recommend it. The output transformers are very inexpensive (Edcors). The schematic is below.

18th February 2008, 01:03 AM	#1
Psychobiker diyAudio Member Join Date: Jul 2005 Location: Oireland, bejappers	6V6 Output? Some say the 6V6, as per the Boozhounds build (6SN7 driver) will yield only 3W, yet I hear 12-odd watts bandered about, or is this only the GTA? L

18th February 2008, 01:52 AM	#2
Andrewbee diyAudio Member Join Date: Apr 2002 Location: Cayman Islands	12 watts would be in push pull, ~ 3 watts in se and ~5 or so watts se with separate screen supply or ul. __________________ The path to freedom begins with forgiveness.

18th February 2008, 02:11 PM	#5
Robert McLean diyAudio Member Join Date: May 2005 Location: Stittsville, Ontario, Canada	Dont put the 3.5K resistor in series with the transformer. Yes, the tube will see something like 8.5K, but thats not the point. The 3.5K resistor is going to drop over 100 volts due to plate current and completely change the operating point. It will also dissipate about 40% of whatever ac output ower is produced, so considering power reduction due to 5k ac load line vs 8.5K, different operating point, and 40% loss in the resistor, you might only get 1 or 2 watts out. (guesstimate, precise numbers would need to be calculated) You would be better off just using the 5K transformer. Best of all of course is the 8.5K transformer. __________________ Robert McLean

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18th February 2008, 01:53 AM	#3
sorenj07 diyAudio Member Join Date: May 2006	triode SE will probably be around 3 watts. ultra-linear SE will probably be around 4 watts. pentode SE will probably be around 5 watts. triode PP will probably be around 6 watts. ultra-linear PP will probably be around 12 watts. pentode PP will probably be around 15 watts. also depends on things like bias point, OPT primary impedance, etc. etc.

18th February 2008, 12:46 PM	#4
Psychobiker diyAudio Member Join Date: Jul 2005 Location: Oireland, bejappers	Cheers, upon further digesting the data sheet, it seems with 315V plate, triode strapped, it'll yield about 5.5W, given an 8k5 load. I'm taking it this can be made of a 5k OPT, and 3.5k resistor in series - surely the valve would 'see' 8k5? L

18th February 2008, 02:23 PM	#6
Tom Bavis diyAudio Member Join Date: Jun 2002 Location: Macedon NY	A 5K transformer will work nicely at a different operating point, say about 250V / 50 mA...

18th February 2008, 10:03 PM	#7
Psychobiker diyAudio Member Join Date: Jul 2005 Location: Oireland, bejappers	AFAIK, thats what the boozhound is calculated at - 250V. Any recommendations on OPTs? Budget of appx $150. I've heard Frag Jan Zuerst's are quite good,? L

19th February 2008, 02:13 PM	#8
stalker diyAudio Member Join Date: Sep 2004 Location: Madrid	A single 6v6 in triode 1.5 Watts maximum. No way you can get 3 Watts. Try el84, a little more power for less distortion. Anyway this is what simSE says. Simulation tube program by Broskie.

19th February 2008, 02:17 PM	#9
Psychobiker diyAudio Member Join Date: Jul 2005 Location: Oireland, bejappers	At what voltage tho? L

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