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1. [AMPS] Splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sat, 7 Jun 1997 09:06:32 +0000; While there is no dB figure given, the rules plainly state by-products from modulation should be held to state of the art levels. It is also illegal to cause interference or have modulation products; /archives//html/Amps/1997-06/msg00086.html (9,738 bytes)
2. [AMPS] Splatter (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 7 Jun 97 11:20:32 -0700; State of the art is anybody's guess. The only thing that holds water is an X decibels down at Y kHz specification--and there isn't one. Breaking fcc rules is not the same as breaking a legal law. Sa; /archives//html/Amps/1997-06/msg00090.html (8,474 bytes)
3. [AMPS] Splatter (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Sat, 07 Jun 1997 17:57:17 EDT; WRONG Carl, Rich....I'm still alive...last time I looked. My last FCC pink slip was in 1955 when my ARRL Handbook 6AG7-6L6 rig was putting out more RF on a Canadian Aviation freq on 11.1 MHz than on; /archives//html/Amps/1997-06/msg00095.html (8,467 bytes)
4. [AMPS] Splatter (score: 1): Author: andrew@gi0nwg.demon.co.uk (Andrew Williamson); Date: Sun, 8 Jun 1997 01:51:14 +0100; Hi guys, I don't know much about amps or tubes but I'm learning a LOT from the discussions on this reflector. That's why I subscribed. So, here's a question which I hope isn't too far off topic. As; /archives//html/Amps/1997-06/msg00097.html (9,740 bytes)
5. [AMPS] Splatter (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 7 Jun 97 20:29:32 -0700; According to the FCC, mine was QRMing 8 - 9 MHz. You must have used shorter lead lengths, Carl. I wonder how many other guys besides us got cited, due to this idiotic design. For me, the last straw; /archives//html/Amps/1997-06/msg00098.html (8,935 bytes)
6. [AMPS] Splatter (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 7 Jun 97 20:56:34 -0700; anyone The "bad news" is not damage to the tubes' 2w-rated grids, Andrew. The "bad news" is rotten splatter. In a grid-driven amplifier, a small amount of grid current means a large amount of interm; /archives//html/Amps/1997-06/msg00100.html (8,971 bytes)
7. [AMPS] Splatter (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 8 Jun 1997 08:54:41 +0100; It's absolutely spot-on topic. It depends what you call "delicate". The 4CX800 has a rated maximum grid dissipation of 2W, which means that at the normal bias voltage of -60V you could run as much as; /archives//html/Amps/1997-06/msg00102.html (11,165 bytes)
8. [AMPS] Splatter (score: 1): Author: af006@lafn.org (Harv Shore); Date: Sun, 8 Jun 1997 08:57:01 -0700; 4CX1000 grids are "zero" dissipation -- common information. For anyone who does not believe this well It helps the economy to buy more One of the first modifications Collins suggested for the 30S1 wa; /archives//html/Amps/1997-06/msg00104.html (11,621 bytes)
9. [AMPS] Splatter (score: 1): Author: andrew@gi0nwg.demon.co.uk (Andrew Williamson); Date: Mon, 9 Jun 1997 01:35:21 +0100; I'm learning a lot here, so I'll ask another couple of questions. Regarding the ALC mentioned above, is that the ALC line back to the rig? If so, I don't have one connected because ETO state in their; /archives//html/Amps/1997-06/msg00109.html (11,206 bytes)
10. [AMPS] Splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 00:21:43 +0000; Hi Ian, Grid dissipation is not bias voltage times grid current. It is the value of POSITIVE grid voltage (with respect to the cathode) times grid current integrated over the conducting portion of th; /archives//html/Amps/1997-06/msg00115.html (11,169 bytes)
11. [AMPS] Splatter (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 9 Jun 97 04:51:21 -0700; It looks like Mr. Rauch needs to read Svetlana's 4CX800A spec. sheets. Rich-- R. L. Measures, 805-386-3734, AG6K -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com; /archives//html/Amps/1997-06/msg00122.html (8,787 bytes)
12. [AMPS] Splatter (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 9 Jun 97 04:51:23 -0700; Yes, but does it wash? When a tube with a high output-R (100k ohm) bias supply is temporarily overdriven by a voice peak, the negative grid bias voltage temporarily increases due to grid-rectificati; /archives//html/Amps/1997-06/msg00123.html (9,043 bytes)
13. [AMPS] Splatter (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 9 Jun 1997 09:34:49 +0100; Oops - my mistake, thanks for the correction, Tom. I extrapolated too far from the simple fact that the 4CX800 and 400 have the same 2W maximum grid dissipation as the 4CX250 which can be operated in; /archives//html/Amps/1997-06/msg00126.html (12,563 bytes)
14. [AMPS] Splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 10:16:53 +0000; You idea does not wash at all Rich. IMD is caused by plate current saturation, as well as non-linearity in the grid. Of these two effects, plate current saturation by far dominates the IMD. We know; /archives//html/Amps/1997-06/msg00134.html (9,905 bytes)
15. [AMPS] Splatter (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 9 Jun 1997 14:05:36 +0100; ... which causes gain compression and IMD. That's a circular argument. You're ASSUMING that grid current causes IMD, so of course you must "deduce" that anything that limits grid current must reduce; /archives//html/Amps/1997-06/msg00136.html (11,598 bytes)
16. [AMPS] Splatter (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 9 Jun 97 09:37:27 -0700; Does MFJ-Ameritron make a Class AB1 grid-driven amplifier? We? Who is 'we'? During the parasitics debate I often tried to find out who 'they' was. No luck. Rich-- R. L. Measures, 805-386-3734, AG6K; /archives//html/Amps/1997-06/msg00137.html (9,715 bytes)
17. [AMPS] Splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 13:13:19 +0000; Hi Ian, I see why you said that, looking at the 4CX250. I just didn't want people to assume grid dissipation is given by multiplying grid current times dc grid bias. Clearly, that is NOT the case. Th; /archives//html/Amps/1997-06/msg00139.html (11,987 bytes)
18. [AMPS] Splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 17:03:32 +0000; Hi Ian, It's easy to spot someone who has measured or really understands the cause of a problem. <snip> Anyone who has ever watched IMD products on a spectrum analyzer would appreciate your words Ian; /archives//html/Amps/1997-06/msg00141.html (9,938 bytes)
19. [AMPS] Splatter (score: 1): Author: W8IK@IBM.NET (Joe Subich, W8IK); Date: Mon, 09 Jun 1997 21:56:15 -0400; How true, Tom. The effect of allowing (excess) drive to move the screen and/or control grid operating point is much like allowing modulation to move the voltage applied to the synthesizer (VFO) of th; /archives//html/Amps/1997-06/msg00148.html (9,271 bytes)
20. [AMPS] splatter (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 10 Jun 1997 11:07:00 +0100; Hi guys, Been following the discussion for some time. I'll start by being controversial - when you run grid current in AB1, it's not AB1 anymore, it's AB2. AB1 is defined as 'no grid current', so you; /archives//html/Amps/1997-06/msg00150.html (12,697 bytes)

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