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Send new message to groupFrom: TT - 03 May, 03:47
Some of you fine people have enquired why I accused Arny of perhaps sipping too much Altar wine the other day. Well I think he is a little embarrassed because, *shock*, horror he has deleted his post from newsgroups. Oh poor Arny! Any way I saved a copy to my hard drive and it looks like I need to post the relevant excerpts so you can all see how...
2 Posts. Last post send by: TT - Saturday 03 May
From: Keith Park - 03 May, 03:09
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From: Ted - 02 May, 18:31
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3 Posts. Last post send by: Ted - Friday 02 May
From: RealInfo - 02 May, 09:55
Hi all I want to build a active speaker with built in tube amp in each . How do I prevent microphony `? Will it help if only the preamp will be small signal tubes base like ecc83 and the power will be solid stae ? By the way the speaker is intended for keabords usage . Many thanks in advance EC
4 Posts. Last post send by: RealInfo - Friday 02 May
From: Alex - 02 May, 04:07
Hello. I noticed that in most cases a capacitor or a RC circuit is connected across the primary of a tube OPT. It is apparently to compensate for the leakage inductance of the transformer. However, I am not sure how to correctly calculate this RC circuit. If I know my load impedance Rl, if I know output tube internal resistance Ra, if I know (measured)...
70 Posts. Last post send by: Alex - Friday 02 May
From: Andre Jute - 30 Apr, 23:29
On Apr 30, 7:14 am, "West" <w...@verizon.net> wrote: > Talk about sound, Boss. Just what kind of Gregorian Chant juxtaposition > (best word I can think of at this ungodly hour) with the clarinet do you > listen to? I simply adore Gregorian Chant and I also am fond of the > clarinet. Combining the two seems a bit off-beat and confusing, but I know= >...
3 Posts. Last post send by: Andre Jute - Wednesday 30 Apr
From: Ian Thompson-Bell - 30 Apr, 12:18
I finally cracked it - or rather found the text with an explanation I could understand. Basically, with shunt applied feedback it is currents that are summed/subtracted at the input. As the output is a voltage the stage is a transconductance amplifier so the closed loop gain is in the form of Vo/Ii which does turn out to be Ao/(1+ß.Ao) and ß is simply...
8 Posts. Last post send by: Ian Thompson-Bell - Wednesday 30 Apr
From: flipper - 30 Apr, 06:39
Just thought I'd mention there are a number of tube manuals/books on alt.binaries.e-book.technical Data manuals from RCA, Raytheon, Sylvania, Mullard, Western Electric, etc. RCA Theramin User and Service Manuals. A collection of tube amplifier schematics in "143 Tube Amplifier Schematics,' and more. The posting is a bit old, back in February, so depends...
1 Posts. Last post send by: flipper - Wednesday 30 Apr
From: --- - 30 Apr, 01:20
Thanks for looking !!! http://search.ebay.com/_W0QQsassZtube.guy
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From: Patrick Turner - 29 Apr, 15:28
One of the most common things people don't understand when trying to build an OPT for a single ended amp with one output device or a number of them in parallel is the determination of the air gap as well as other considerations. I'll try to make my logic flow about the issue as brief and easy for anyone to follow. It is applicable for any type of SE...
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From: Adam Stouffer - 29 Apr, 03:26
After reading up about tubes like the 316A or 368A they leave me with a few questions. Why are the filaments at such a low voltage with such a high current? 1.15v at 4.5 amps is pretty odd. A few tenths of an ohm contact resistance would really effect emission. The plate structures inside look very small for their rated dissipation. The 368A plate looks...
1 Posts. Last post send by: Adam Stouffer - Tuesday 29 Apr
From: Hp - 28 Apr, 17:49
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From: shawn s - 27 Apr, 04:40
Looking for a pair or so for my preamp one of mine is going microphonic Shawn
1 Posts. Last post send by: shawn s - Sunday 27 Apr
