- 1. [Amps] SB-220 Plate Tuning Capacitor (score: 1)
- Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
- Date: Sat, 03 Jun 2006 23:55:26 +0000
- In late 1987 or early 1988, after some months of frequent arcing at my SB-220 plate tuning capacitor (stock P/N 26-131), I ordered a replacement from Heath. In return I received P/N 26-164 and a serv
- /archives//html/Amps/2006-06/msg00071.html (9,921 bytes)
- 2. Re: [Amps] SB-220 Plate Tuning Capacitor (score: 1)
- Author: "Will Matney" <craxd1@verizon.net>
- Date: Sat, 03 Jun 2006 21:57:20 -0400
- Bud, You gave very good info by reposting the old article with the part numbers. An OEP number is an Oren Elliott part number (OEP 26-164) which can be had by contacting them. They can reproduce this
- /archives//html/Amps/2006-06/msg00078.html (12,304 bytes)
- 3. Re: [Amps] SB-220 Plate Tuning Capacitor (score: 1)
- Author: "Will Matney" <craxd1@verizon.net>
- Date: Sat, 03 Jun 2006 22:40:58 -0400
- Bud, Since Oren Elliott has made the one capacitor, I'll bet they made both tune and load C in the later models. They're who pretty much makes the majority of them now which are ceramic bodied like t
- /archives//html/Amps/2006-06/msg00079.html (11,314 bytes)
- 4. Re: [Amps] SB-220 Plate Tuning Capacitor (score: 1)
- Author: gudguyham@aol.com
- Date: Mon, 05 Jun 2006 09:56:43 -0400
- I stand to be corrected, I never measured them. Now that I think about it I do recall some being a little longer in length but I did not think it was because they increased the plate spacing. I apolo
- /archives//html/Amps/2006-06/msg00118.html (12,813 bytes)
- 5. Re: [Amps] SB-220 Plate Tuning Capacitor (score: 1)
- Author: Gudguyham@aol.com
- Date: Tue, 6 Jun 2006 10:56:18 EDT
- hope the above is adequate documentation of the facts concerning the SB-220 Tune capacitor. Bud, W2RU Good work Bud, Thanks for the info. 73 Louie _______________________________________________ Amps
- /archives//html/Amps/2006-06/msg00162.html (6,503 bytes)
- 6. Re: [Amps] SB-220 Plate Tuning Capacitor (score: 1)
- Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
- Date: Tue, 6 Jun 2006 18:03:56 +0200 (CEST)
- 73 Peter G3RZP _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
- /archives//html/Amps/2006-06/msg00167.html (7,887 bytes)
- 7. Re: [Amps] SB-220 Plate Tuning Capacitor (score: 1)
- Author: Gudguyham@aol.com
- Date: Tue, 6 Jun 2006 17:00:24 EDT
- bandswitch is right on edge for the kW input power level, and too small at 1500 watts for safety. Really needs a bigger one, with a heavier indexing mechanism. Now this isw ithout any parasitics, cha
- /archives//html/Amps/2006-06/msg00181.html (8,763 bytes)
- 8. Re: [Amps] SB-220 Plate Tuning Capacitor (score: 1)
- Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
- Date: Wed, 7 Jun 2006 12:51:42 +0200 (CEST)
- at sea-level. At 390v peak output into 50-ohms, the actual potential across open bandswitch contacts is c. 2600v-pk.< And what is the manufacturer's rating? For some reason I don't understand, things
- /archives//html/Amps/2006-06/msg00191.html (7,424 bytes)
- 9. Re: [Amps] SB-220 Plate Tuning Capacitor (score: 1)
- Author: R L Measures <r@somis.org>
- Date: Wed, 7 Jun 2006 02:31:40 -0700
- The measured breakdown potential of a SB-220 bandswitch is c. 4900v at sea-level. At 390v peak output into 50-ohms, the actual potential across open bandswitch contacts is c. 2600v-pk. R L MEASURES,
- /archives//html/Amps/2006-06/msg00210.html (7,834 bytes)
- 10. Re: [Amps] SB-220 Plate Tuning Capacitor (score: 1)
- Author: R L Measures <r@somis.org>
- Date: Wed, 7 Jun 2006 04:23:15 -0700
- Much less, but its RMS. Me neither, but they do, and the effect becomes more pronounced as freq. increases. For example, a Jennings 15kVdc/60Hz-rated vacuum cap is rated at 9kV at 30MHz. I once built
- /archives//html/Amps/2006-06/msg00212.html (8,255 bytes)
- 11. Re: [Amps] SB-220 Plate Tuning Capacitor (score: 1)
- Author: R L Measures <r@somis.org>
- Date: Thu, 8 Jun 2006 08:51:13 -0700
- Measurements with an oscilloscope and a 49.9-ohm termination, sending 50wpm dits on the SSB tap. Hams and the FCC - do not measure peak W, they measure PEP, which is an RMS measurement. For example,
- /archives//html/Amps/2006-06/msg00228.html (10,410 bytes)
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