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Quad 405 with current dumping by Alex Pogossov
In another thread Phil Allison commended Quad 405. Its typical schematic is he http://schematic.narod.ru/Audio/semi/Amp/Quad405-2.gif Assuming that Phil...
June 23rd 13 01:05 AM
by Phil Allison[_3_] Go to last post
7 5,732
RCA 30W amps from about 1960 by patrick-turner
I have a new website page on RCA High-Fidelity Orthophonic 30W amps which originally had EF86, KT66, and GZ32. See...
June 20th 13 05:22 AM
by patrick-turner Go to last post
0 865
Speaker Matching transformers. by patrick-turner
Hi all, I have a new web page for matching speakers to amplifiers to give a better match than may be available, ie, make a 2 ohm speaker look just like a 16...
(Multi-page thread 1 2)
June 16th 13 07:53 AM
by Alex Pogossov Go to last post
16 1,814
Tannoy NOS drivers in bamboo plywood boxes by patrick-turner
** Shame about what you ACTUALLY posted and then SNIPPED out of your reply to hide it. What a despicable, bloody LIAR you are. Then you go and make it...
June 3rd 13 10:44 AM
by Phil Allison[_3_] Go to last post
1 889
Tannoy NOS drivers in bamboo plywood boxes by patrick-turner
Hi Phil, I post via Coogle and I cannot reply to anyone's post, only to my own after clicking 'post reply' Its something I don't get about Google, or my...
June 2nd 13 01:10 PM
by Phil Allison[_3_] Go to last post
1 841
Tannoy NOS drivers in bamboo plywood boxes by patrick-turner
Phil idioticated..... ** ROTFL !! Having a very stiff enclosure ( eg a concrete pipe) INCREASES the amount of internal sound reflection. Filling the...
June 1st 13 07:24 AM
by Phil Allison[_3_] Go to last post
1 853
Tannoy NOS drivers in bamboo plywood boxes by patrick-turner
Phil Allison May 26 Other recipients: "patrick-turner" > > Hi all, another page for everyone to argue about at my website, >...
May 29th 13 12:22 AM
by Phil Allison[_3_] Go to last post
1 972
Tannoy NOS drivers in bamboo plywood boxes by Phil Allison[_3_]
"patrick-turner" > > Hi all, another page for everyone to argue about at my website, > http://www.turneraudio.com.au/loudspeakers-tannoy.html > This one is...
May 26th 13 01:01 PM
by Phil Allison[_3_] Go to last post
0 886
FS: RARE Tubes Genalex Telefunken and more! by [email protected]
On Monday, January 3, 2000 4:00:00 PM UTC+8, wrote: > For Sale:I am selling my collection of Vintage NOS & Used tubes. Some Brands include...
May 22nd 13 02:47 AM
by [email protected] Go to last post
0 957
Hybrid amp, EL34 drive to compound complementary mosfet output by patrick-turner
I've posted up an additional schematic for a Hybrid amp for 39Watts class A which has EL34 driving complementary N&P source followers helped along by common...
April 26th 13 11:40 AM
by patrick-turner Go to last post
4 1,256
1 Attachment(s) Series Shunt regulator by [email protected]
Hi! I posted this on my friend's behalf. Thanks in advance for your advice!! "I have a series regulator board on hand that comprises 6080, 6SL7 and OB2. Can I...
April 18th 13 09:43 PM
by John L Stewart Go to last post
2 988
Tube poem by Robert Casey
I think I'll never see a poem as lovely as a tube. A tube whose hungry cathode is pressed against the Earth's sweet flowing current. A tube that amplifies God...
(Multi-page thread 1 2)
April 13th 13 08:27 AM
by Desuma Go to last post
11 1,719
Some tubes for selling - NOS & used by tube`freak
Please check the updated list in the end of this thread. Thank you!
(Multi-page thread 1 2 3)
April 11th 13 02:15 AM
by tube`freak Go to last post
20 5,771
THD testing of amplifiers. by patrick-turner
I have added another page to my website which explains the analog gear needed to test amplifiers, including 5 schematics...
April 9th 13 03:40 PM
by patrick-turner Go to last post
3 942
Smile
2 Attachment(s) Amplifier Burst Testing by John L Stewart
The original of this article was published in AudioXpress magazine, sometime in 2001. I had to remove the parts list as the post was too long. Try that...
(Multi-page thread 1 2)
April 8th 13 07:04 AM
by Phil Allison[_3_] Go to last post
12 2,518
Smile
3 Attachment(s) Cascode Amp responds to Large Signal Burst by John L Stewart
Here is a different kind of test on the PP 6V6 AB2 amp that I posted a while ago. And an updated schematic. The PS is a Hammond 271X into a FW CT, 1N4007s into...
March 28th 13 05:27 AM
by Alex Pogossov Go to last post
4 1,166
Smile
2 Attachment(s) Simple Low Power Constant Current Test Set by John L Stewart
This article was originally published in the July 2001 issue of AudioXpress magazine. It came to mind again the other day when Alex P mentioned the Sziklai...
March 25th 13 10:50 PM
by John L Stewart Go to last post
1 906
Darlington and Sziklai pair by Alex Pogossov
Hello, I uploaded another article. http://www.valveradio.net/en/home/audio/darlington.html Though it is not about vacuum tubes, I will be referring to it...
March 24th 13 04:27 PM
by patrick-turner Go to last post
1 972
4 Attachment(s) Class-B amplifier, control grids grounded, input to the screens. by Alejandro Lieber[_3_]
In figu http://1fcr.com.ar/classB.jpg you can see a very interesting diagram of the audio modulator of an old AM Gonset transmiter. A 12AT7 as voltage...
March 20th 13 02:24 AM
by John L Stewart Go to last post
8 4,752
Hybrid amps with tubes driving mosfets by patrick-turner
Hi all, if there is anyone at all reading anything, and not bored by the world and / or amplifiers. I've just posted up a page on Hybrid amplifiers where I...
March 17th 13 02:38 PM
by mick Go to last post
1 873
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