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1. [Amps] 813 Filament Transformer (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Tue, 23 Jan 2007 04:45:15 -0700
I am building a 2x 813 amp and am looking for a filament transformer. I need some coaching on a couple options since I cannot seem to locate a proper 10V 10A transformer. 1) Use a 13v @ 20A transform
/archives//html/Amps/2007-01/msg00242.html (6,421 bytes)

2. [Amps] constant current curves (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Sun, 28 Jan 2007 13:43:00 -0700
Was EIMAC the only folks who published CC curves with their tube specs? I have a copy of their 'care and feeding' booklet, and the associated calculator, as part of my effort to learn more about ampl
/archives//html/Amps/2007-01/msg00302.html (7,199 bytes)

3. [Amps] Plate Load Calc. (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Fri, 2 Mar 2007 18:23:08 -0700
For calculating Resonant Plate Load, Orr's Handbook suggests 1.8 for the K-factor for Class B and C. Tonne's PI-EL software uses a K-factor of 1.8 for Class B and 2.0 for Class C. This gives quite a
/archives//html/Amps/2007-03/msg00014.html (6,281 bytes)

4. Re: [Amps] Plate Load Calc. (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Sat, 3 Mar 2007 15:41:38 -0700
Thanks Manfred, that makes sense to me. But then I wonder why fudge factors are used at all? Your example calculation doesn't appear any more complicated than the "fudged" handbook equations. As a n
/archives//html/Amps/2007-03/msg00034.html (9,990 bytes)

5. [Amps] drive power (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Sat, 17 Mar 2007 08:00:39 -0600
As I muddle through the understanding of amp design, there is a remaining topic that is confusing me - in regard to matching drive power to the exciter (in this case a modern 100w transceiver). I und
/archives//html/Amps/2007-03/msg00196.html (7,614 bytes)

6. Re: [Amps] drive power (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Sat, 17 Mar 2007 09:41:22 -0600
Perhaps I was getting lost or misinterpreting this information from Tom, W8JI: http://www.w8ji.com/loading_amplifier.htm When I read this I conclude that my exciter (TS-870S) should be run to full 10
/archives//html/Amps/2007-03/msg00201.html (6,980 bytes)

7. [Amps] Tank Coil spacing (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Sun, 25 Mar 2007 17:45:32 -0600
As I begin to experiment with component layout on an amp ("playing chassis-chess"), the biggest hurdle is trying to maintain the requisite space around the pi and L coils. I wound them 3" diameter 10
/archives//html/Amps/2007-03/msg00335.html (6,986 bytes)

8. Re: [Amps] Pi L networks (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Fri, 30 Mar 2007 06:16:52 -0600
Here is what I've derived for my 160 amp for a 2700-ohm plate load. Ctune 250pF Cload 1500 pF Lpi 39 uH Lel 9.1 uH Based on my previous questions regarding making room for everything and the answers
/archives//html/Amps/2007-03/msg00409.html (7,576 bytes)

9. [Amps] full range C vs. padders (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Sat, 31 Mar 2007 08:31:49 -0600
My 160m/80m/40m/20m amp design calls for a 250pF Ctune and 1500pF Cload. I notice some designs use capacitors with the full capacitance range variables, while others use lower-value variables and fix
/archives//html/Amps/2007-03/msg00416.html (6,676 bytes)

10. [Amps] amp hardware (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Tue, 10 Apr 2007 04:37:07 -0600
If I'm building up an amp (the RF compartment particularly) with aluminum sheet and angle stock, should I be using aluminum bolts/nuts/washers to avoid galvanic corrosion? Steve, KK7UV ______________
/archives//html/Amps/2007-04/msg00047.html (6,165 bytes)

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