Mail Archive Search: <+from:dhearn at ix.netcom.com>

Results:

References: [ +from:dhearn: 181 ] [ at (Too many documents hit. Ignored) ] [ ix.netcom.com: 14 ]

Total 11 documents matching your query.

1. [Amps] Power supply design considerations (score: 206): Author: dhearn at ix.netcom.com (Dan); Date: Tue Jul 1 09:49:39 2003; Jim: Spark plug wire is excellent for the purpose and is easily available. RG 213 class coax is also frequently used. Considering the safety aspects you mention, I would use spark plug wire inside sh; /archives//html/Amps/2003-07/msg00176.html (9,347 bytes)
2. [Amps] TL-922 10 meter conversion (score: 206): Author: dhearn at ix.netcom.com (Dan); Date: Thu May 1 08:51:19 2003; There is information on that subject on Measures web site http://www.vcnet.com/measures/ Look under Dovetron. 73, Dan, N5AR Does anyone have information on how to perform the 10 meter conversion on t; /archives//html/Amps/2003-05/msg00001.html (6,912 bytes)
3. [Amps] Transformer question (score: 206): Author: dhearn at ix.netcom.com (Dan); Date: Fri May 9 08:47:19 2003; I believe you have answered your own question, Jeff. Transformers of this general type, with a tuned third winding were built by Sola, Raytheon and probablly others. Usually they were used to regulat; /archives//html/Amps/2003-05/msg00065.html (10,194 bytes)
4. [Amps] 2:1 Transformer (score: 206): Author: dhearn at ix.netcom.com (Dan); Date: Tue May 27 08:40:23 2003; Yury: You need a copy of Jerry Sevicks book "Transmission Line Transformers". He shows many designs of transformers which have ratios near 2:1 as well as dozens of others. These amazing xfmrs have ba; /archives//html/Amps/2003-05/msg00199.html (7,838 bytes)
5. [Amps] Fw: [TowerTalk] baloon supported wire verticals (score: 206): Author: dhearn at ix.netcom.com (Dan); Date: Fri Apr 4 10:15:19 2003; I don't know if you are still getting TT or not Gary. There are some good ideas in this post. 73, Dan Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for; /archives//html/Amps/2003-04/msg00018.html (11,879 bytes)
6. [Amps] Help Alpha 77-DX (score: 206): Author: dhearn at ix.netcom.com (Dan); Date: Mon Apr 28 10:43:49 2003; Terry: The schematic for my 77DX shows separate, additional loading , fixed caps on A and B. One is a parallel pair of 100pf caps and the other is a 500pf cap. The description re RF amp says nothing; /archives//html/Amps/2003-04/msg00227.html (7,580 bytes)
7. [Amps] rebuilding switches? (score: 206): Author: dhearn at ix.netcom.com (Dan); Date: Sat Feb 8 21:08:52 2003; Richard, I believe, from your description, that the switch is a JV series Centralab switch. These are used in quite a few linear amps and antenna tuners. You could probably obtain one from MFJ. I thi; /archives//html/Amps/2003-02/msg00188.html (7,624 bytes)
8. [Amps] FT-990 keying TL-922? (score: 206): Author: dhearn at ix.netcom.com (Dan); Date: Tue Jan 21 22:02:58 2003; The 922 t/r relay circuit is 100V and 40ma. If your 990 can output +12 v on xmit, you can use a power NPN transistor to switch the 922 line to ground. Collector to the 922 rly line, emitter to gnd an; /archives//html/Amps/2003-01/msg00177.html (7,773 bytes)
9. [Amps] FT-990 keying TL-922? (score: 206): Author: dhearn at ix.netcom.com (Dan); Date: Tue Jan 21 22:32:51 2003; OOPS. Should have said the voltage divider connects to the power transistor base. You might try 3k in series to the base and 1k base to gnd . 73, Dan, N5AR -- Original Message -- From: David Jones <d; /archives//html/Amps/2003-01/msg00178.html (7,635 bytes)
10. [Amps] RE: Problems with Heath SB-220 (score: 206): Author: dhearn at ix.netcom.com (Dan); Date: Wed Jan 22 17:08:08 2003; Hi Julio: A friend KD7OY just had exactly the same problem. We found that the relay contacts which short the amp T/R line were welded together.holding the amp in the xmit mode even when he switched t; /archives//html/Amps/2003-01/msg00183.html (10,014 bytes)
11. [Amps] FL2100B (score: 206): Author: dhearn at ix.netcom.com (Dan); Date: Mon Aug 4 08:39:26 2003; Hi Carl: I have one of the 2100B amps. The only thing unusual about it is that the LV internal PS for the rig is positive grounded so it can be used for negative bias on the tube. The same PS is used; /archives//html/Amps/2002-09/msg00311.html (7,771 bytes)

Current List: 1 - 11
Page: [1]