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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
2 933
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 1,612
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 5,620
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
3 883
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 2,370
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 04:27 AM
by Alex Pogossov Go to last post
4 1,105
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 09:50 PM
by John L Stewart Go to last post
1 829
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 03:27 PM
by patrick-turner Go to last post
1 901
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 01:24 AM
by John L Stewart Go to last post
8 4,565
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 01:38 PM
by mick Go to last post
1 830
Walnut Hammond Chassis by MarkS
Just saw these, about $77 from Digikey & Mouser; more from Newark / Allied. http://www.hammondmfg.com/HWCHAS.htm Hmmm.....was looking for a reason to do some...
March 17th 13 04:08 AM
by MarkS Go to last post
0 720
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3 Attachment(s) Long Tail Phase Splitter by John L Stewart
In a previous post John Byrnes asked why I used a resister rather than an MJE340 for the long tail in a phase splitter. The short answer is that it works &...
March 16th 13 10:03 PM
by John L Stewart Go to last post
5 1,126
A Stupid Idea by Bret L
The latest AudioXPress has on its cover a stereo amplifier using one 4D32 tetrode in Class AB2 per channel as an output device. Why do people persist in acts...
(Multi-page thread 1 2 3 ... Last Page)
March 13th 13 04:53 PM
by The real GARY Go to last post
32 4,128
HT Stabilizer by Servo Kon
We offer the range of HT Stabilizer, HT inbuilt Stabilizer manufactured in compliance with international quality standards using high grade raw material. For...
March 13th 13 11:30 AM
by Servo Kon Go to last post
0 711
Boosted cathode follower, super cathode follower etc by patrick-turner
Recently we heard about Mr Pogossov's "boosted cathode follower" using a bjt between the cathode and 0V rail where the bjt has base current from an anode R...
March 4th 13 09:25 AM
by patrick-turner Go to last post
2 1,624
Smile
1 Attachment(s) Replying to a Private Message by John L Stewart
Need some help here. How does one reply? All I can see is Forward, Delete & some other stuff but nowhere can I see how to reply. Thanx for help, Cheers to...
March 1st 13 06:23 AM
by patrick-turner Go to last post
1 770
FS: NOS KenRad 6SN7 -GT (Smoke Glass Pairs/Quads) VT-231s by [email protected]
On Sunday, August 22, 1999 3:00:00 AM UTC-4, Lets-Make-a-Deal wrote: > I have several beautifully mint NOS-IOB (In original Box) smoke glass KenRad > 6SN7s...
February 28th 13 05:17 PM
by Muck Krieger Go to last post
1 658
QUAD I amplifiers by Simon Whiting
Hi all, I don't know much about valve amplifiers, and I hope that your members might be able with some advice. I've got a couple of QUAD I* amplifiers, but one...
February 28th 13 08:56 AM
by patrick-turner Go to last post
1 833
valveradio.net by patrick-turner
On Sunday, 24 February 2013 23:19:59 UTC+11, Alex Pogossov wrote: > On the dusk of my days I decided to follow an example of some folks and launched my...
February 28th 13 08:24 AM
by patrick-turner Go to last post
2 793
6SN7GT PREAMP TUBES by Haywood Yastoppit
Here are some 6SN7GT dual triode tubes for sale on eBay. Various brands. Mostly used, but good older, tested, USA-made tubes. RCA, General Electric, Arcturus,...
February 11th 13 03:12 AM
by Haywood Yastoppit Go to last post
0 660
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