Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+8877\s+bias\s+curve\?\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+8877\s+bias\s+curve\?\s*$/: 10 ]

Total 10 documents matching your query.

1. [AMPS] 8877 bias curve? (score: 1): Author: N7CXI@SiliconPixels.com (Jim Barber); Date: Fri, 02 Nov 2001 03:40:50 -0800; Hi folks, Doing some tinkering here, I worked out a polynomial based on Eimac's GG constant current curves for the 8877 to calculate static plate current based on a given bias voltage. Does anyone ha; /archives//html/Amps/2001-11/msg00010.html (8,099 bytes)
2. [AMPS] 8877 bias curve? (score: 1): Author: 2@vc.net (2); Date: Fri, 2 Nov 2001 05:54:18 -0800; / As I read it, 8.2V of cathode-grid bias produces c. 185mA of ZSAC. However, even at 90mA of ZSAC, an 8877 is so much cleaner than today's transceivers, it would make virtually no audible on-the-ai; /archives//html/Amps/2001-11/msg00012.html (8,539 bytes)
3. [AMPS] 8877 bias curve? (score: 1): Author: N7CXI@SiliconPixels.com (Jim Barber); Date: Fri, 02 Nov 2001 06:10:41 -0800; Thanks! It's just a tinker-project anyway, but I thought it would be closer than that. Some day down the road I'd like to work out a real model, so that I could watch things spin around in SPICE. No; /archives//html/Amps/2001-11/msg00013.html (8,112 bytes)
4. [AMPS] 8877 bias curve? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Fri, 2 Nov 2001 10:00:52 -0600; Drifting a bit off topic for AMPS, but I have been wondering for a long time why someone would pay double $$ for a FT-1000D over a MK-V. Is the MK-5 really that bad, or the FT-1000 really that good?; /archives//html/Amps/2001-11/msg00015.html (7,810 bytes)
5. [AMPS] 8877 bias curve? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Fri, 2 Nov 2001 10:05:41 -0600; Looks really close to me, Jim. I agree, Rich. When running an 8877 at the full 4KV, I have always used 12 volts of bias to cut the heat in the shack down a bit. I doubt if there is any measurable dif; /archives//html/Amps/2001-11/msg00017.html (8,360 bytes)
6. [AMPS] 8877 bias curve? (score: 1): Author: gdaught6@leland.stanford.edu (George T. Daughters); Date: Fri, 2 Nov 2001 08:22:37 -0800; Another thing to remember that any published curves and numbers are probably averages. The bias "curve" is really a big, fat, wide "smear." Different tubes of the same type might have bias voltages t; /archives//html/Amps/2001-11/msg00018.html (8,996 bytes)
7. [AMPS] 8877 bias curve? (score: 1): Author: N7CXI@SiliconPixels.com (Jim Barber); Date: Fri, 02 Nov 2001 09:06:59 -0800; Thanks, Phil. I penciled in a 12V 50W zener for use at 3900V, but haven't gotten anything off paper yet. I'm also fiddling with a silicon bias switch and regulator combo, but have a ways to go. I lik; /archives//html/Amps/2001-11/msg00019.html (8,149 bytes)
8. [AMPS] 8877 bias curve? (score: 1): Author: 2@vc.net (2); Date: Fri, 2 Nov 2001 09:35:41 -0800; I have heard some 1000Ds with no audible (to me) distortion. cheers, Phil - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissio; /archives//html/Amps/2001-11/msg00020.html (7,792 bytes)
9. [AMPS] 8877 bias curve? (score: 1): Author: 2@vc.net (2); Date: Fri, 2 Nov 2001 09:35:39 -0800; / When I run SSB VOX, there is no anode current 0.5 second after I finish a sentence. Another benefit is that I can hear comments from other denizens. cheers, Jim - R. L. Measures, 805.386.3734,AG6K; /archives//html/Amps/2001-11/msg00021.html (8,308 bytes)
10. [AMPS] 8877 bias curve? (score: 1): Author: 2@vc.net (2); Date: Fri, 2 Nov 2001 09:54:54 -0800; / ref. Fig. 7 on my Web site/ The potential across the optocoupler (Q2) and the bias switch transistor (Q1) is typically <25v at cutoff/Rx and <1v during Tx. Q1 is rated at 100v. Q2 is rated at 80v.; /archives//html/Amps/2001-11/msg00023.html (8,161 bytes)

Current List: 1 - 10
Page: [1]