Just for fun power poll!

M Gregg · 26th October 2011, 09:05 PM

Here is an idea just for fun.

How many watts does you amp take from the mains supply at idle?
(no music).

It's easy measure the AC current x by the AC voltage.

List type of amp PPP, SE, etc and tube type.

It's easy to do...without stripping the amp!

Regards
M. Gregg

M Gregg · 26th October 2011, 10:00 PM

Just to give an idea,

I have a very small SEP 2 x EL34 1 x ecc83

Current is .315A x 245V = 77W

The above are genuine values, just for fun how many of us actually know?

Regards
M. Gregg

DigitalJunkie · 26th October 2011, 10:22 PM

My ST-70 says 175W,IIRC.
My smaller PP 6V6 Amp,I'm not sure,I've never measured it. But,the primary of the power trans is rated 0.92A @ 117V,which would be ~107W (max),if my line were 117V.

Tony · 26th October 2011, 10:27 PM

i used a kill-a-watt to measure the idle power:

this is a 16 KT88 triode mode pp amp sans overall negative feedback:

adason · 27th October 2011, 01:01 AM

I use bruce rozenblit otl tube amp for satelites, which idles at 230 watts,
plus negligible 5 watts solid state for sub.

SemperFi · 27th October 2011, 06:46 AM

My 6AS7 gives me about 2x8watts for sound, and about 80watts of heat, for a total just under 100watts

M Gregg · 27th October 2011, 08:41 AM

Tony,

I am reading correct 451W?

Sorry should have made the poll higher..LOL

Great amp though!

Regards
M. Gregg

M Gregg · 27th October 2011, 08:43 AM

Some great info so far!

It would be interesting to know the less than 50W that have been voted,

My pre draws 35W and its only 4 x ECC88.

Regards
M. Gregg

Tony · 27th October 2011, 08:54 AM

Quote:

Originally Posted by M Gregg

Tony,

I am reading correct 451W?

Sorry should have made the poll higher..LOL

Great amp though!

Regards
M. Gregg

hi Gregg, i had to back down a bit on the bias at -50v, at first, i set the bias at -47volts and this was the reading:

M Gregg · 27th October 2011, 09:00 AM

Do your house lights dip on power up? LOL

Great piece of engineering.

Regards
M. Gregg

View Poll Results: How many Watts, less than?
50W	19	45.24%
100W	13	30.95%
150W	2	4.76%
200W	2	4.76%
250W	2	4.76%
300W	1	2.38%
350W	3	7.14%
Voters: 42. You may not vote on this poll

26th October 2011, 09:05 PM	#1
M Gregg diyAudio Member Join Date: Jun 2010 Location: UK	Just for fun power poll! Here is an idea just for fun. How many watts does you amp take from the mains supply at idle? (no music). It's easy measure the AC current x by the AC voltage. List type of amp PPP, SE, etc and tube type. It's easy to do...without stripping the amp! Regards M. Gregg __________________ What is the sound of one hand clapping?

26th October 2011, 10:00 PM	#2
M Gregg diyAudio Member Join Date: Jun 2010 Location: UK	Just to give an idea, I have a very small SEP 2 x EL34 1 x ecc83 Current is .315A x 245V = 77W The above are genuine values, just for fun how many of us actually know? Regards M. Gregg __________________ What is the sound of one hand clapping?

26th October 2011, 10:27 PM	#4
Tony diyAudio Member Join Date: May 2003 Location: Palatiw, Pasig City	i used a kill-a-watt to measure the idle power: this is a 16 KT88 triode mode pp amp sans overall negative feedback: __________________ http://www.electronicslab.ph/forum/i...?topic=32688.0

27th October 2011, 08:41 AM	#7
M Gregg diyAudio Member Join Date: Jun 2010 Location: UK	Tony, I am reading correct 451W? Sorry should have made the poll higher..LOL Great amp though! Regards M. Gregg __________________ What is the sound of one hand clapping?

26th October 2011, 10:22 PM	#3
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	My ST-70 says 175W,IIRC. My smaller PP 6V6 Amp,I'm not sure,I've never measured it. But,the primary of the power trans is rated 0.92A @ 117V,which would be ~107W (max),if my line were 117V.

27th October 2011, 01:01 AM	#5
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	I use bruce rozenblit otl tube amp for satelites, which idles at 230 watts, plus negligible 5 watts solid state for sub.

27th October 2011, 06:46 AM	#6
SemperFi diyAudio Member Join Date: Jan 2002 Location: nowhere	My 6AS7 gives me about 2x8watts for sound, and about 80watts of heat, for a total just under 100watts

27th October 2011, 08:43 AM	#8
M Gregg diyAudio Member Join Date: Jun 2010 Location: UK	Some great info so far! It would be interesting to know the less than 50W that have been voted, My pre draws 35W and its only 4 x ECC88. Regards M. Gregg __________________ What is the sound of one hand clapping?

27th October 2011, 09:00 AM	#10
M Gregg diyAudio Member Join Date: Jun 2010 Location: UK	Do your house lights dip on power up? LOL Great piece of engineering. Regards M. Gregg __________________ What is the sound of one hand clapping?

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