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1. [Amps] Re: Need help with HB 8877 project (score: 1): Author: realex@flash.net (realex); Date: Thu, 2 Jan 2003 14:29:22 -0600; Im not sure the B&W 852 can handle the power levels you are designing for. I believe a coil made from 1/4" copper tubing would be a better choice. 73, GL Bob, W5AH ___________________________________; /archives//html/Amps/2003-01/msg00014.html (8,600 bytes)
2. [Amps] Bird 1000H slug adjustment? (score: 1): Author: realex@flash.net (realex); Date: Sun, 27 Oct 2002 05:53:10 -0600; Howdy, Sounds to me like you have a 2500 Watt slug that is mislabeled. 73, Bob, W5AH If it's that far out it might need repairing rather than adjusting. Steve ________________________________________; /archives//html/Amps/2002-10/msg00280.html (8,590 bytes)
3. [Amps] RG-174 power handling capacity (score: 1): Author: realex@flash.net (Bob Alexander); Date: Thu, 4 Apr 2002 06:10:00 -0800; Pete, RG-174 is rated @ 170 Watts @ 10 MHz, 72 Watts @ 50 MHz. Loss is 3.8 dB/100Ft at 10 MHz and 6.5 dB/100Ft at 50 MHz. Capacity is 30.8 pF/ Ft. Bob, W5AH --Original Message-- I need some small-dia; /archives//html/Amps/2002-04/msg00142.html (7,410 bytes)
4. [Amps] SB-220 tuning cap needed (score: 1): Author: realex@flash.net (Bob Alexander); Date: Mon, 25 Mar 2002 06:12:42 -0600; --Original Message-- I do not understand why use of the wider spaced cap would cause anxiety about the bandswitch. Bob, W5AH; /archives//html/Amps/2002-03/msg00566.html (7,742 bytes)
5. [Amps] W5FD's PI Net program (score: 1): Author: realex@flash.net (Bob Alexander); Date: Sat, 30 Mar 2002 07:00:47 -0800; Restart your computer in DOS mode...do not open a dos window Bob, W5AH I can't get these programs to run in a DOS window under Win 98. Anybody have any tips? Thanks, Michael _________________________; /archives//html/Amps/2002-03/msg00690.html (7,188 bytes)
6. [AMPS] (score: 1): Author: realex@flash.net (Bob Alexander); Date: Sat, 10 Nov 2001 05:58:04 -0600; Bill, Im trying to figure out where a 600 V 17 mfd cap is used in a MN2700 Bob, W5AH --Original Message-- I was wondering if anyone knows where I could find some replacement capacitors for my Drake M; /archives//html/Amps/2001-11/msg00168.html (6,884 bytes)
7. [AMPS] Question - Using 3 phase Xfmr on single phase power? (score: 1): Author: realex@flash.net (Bob Alexander); Date: Tue, 13 Nov 2001 20:01:04 -0600; Hi Jerry, If the delta primary is strapped externally for delta configuration, try placing two of the primary windings in parallel and leave the third winding disconnected. I did this on a plasma rea; /archives//html/Amps/2001-11/msg00239.html (9,315 bytes)
8. [AMPS] Harbach SB-220 Fan Noise (score: 1): Author: realex@flash.net (Bob Alexander); Date: Sun, 15 Jul 2001 12:16:50 -0500; Howdy, My SB220 has a 6" dia. 220VAC muffin fan installed with a R.S. 24 VAC transformer used as an autotransformer to adjust the supply voltage to around 180 VAC. The fan has less noise and much mor; /archives//html/Amps/2001-07/msg00172.html (7,153 bytes)
9. [AMPS] Henry 3000D rf deck (score: 1): Author: realex@flash.net (Bob Alexander); Date: Wed, 14 Mar 2001 06:15:34 -0600; Hi Bill, The 3000D does not lend itself well to modification for all band use. The Tube plate capacity is rather high making it very difficult to make it work on 10 Meters. To drive the tube to 1500; /archives//html/Amps/2001-03/msg00129.html (8,393 bytes)
10. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: realex@flash.net (Bob Alexander); Date: Thu, 1 Feb 2001 19:37:17 -0600; Eric, Hardwire the cw/ssb switch in the SSB position and use the switch as your standby switch. Bob, W5AH In the May 1989 QST article http://www.arrl.org/tis/info/pdf/sstrans.pdf and a thread a few m; /archives//html/Amps/2001-02/msg00045.html (9,785 bytes)
11. [AMPS] SB-220 High input SWR and transceiver fold back (score: 1): Author: realex@flash.net (Bob Alexander); Date: Wed, 21 Feb 2001 17:37:48 -0600; HOwdy, If the amp input SWR is 1.2:1 with the FT847 in the CW mode and has a problem in the SSB mode, I would think there is a problem with the Yaesu ALC and/or SWR monitoring circuit. Input SWR to t; /archives//html/Amps/2001-02/msg00294.html (9,250 bytes)
12. [AMPS] Amp. Bypass SWR (score: 1): Author: realex@flash.net (bob alexander); Date: Sun, 07 Nov 1999 18:21:21 -0600; Hi Mike, What you are seeing is to be expected. The wiring adds a bit of inductive reactance to the line. I would not bother with it, but if you want to get rid of it, connect a small value cap with; /archives//html/Amps/1999-11/msg00203.html (8,962 bytes)
13. [AMPS] SWR and line length, etc. (score: 1): Author: realex@flash.net (bob alexander); Date: Mon, 04 Oct 1999 06:00:33 -0500; -- Hi Pete, One thing most people on this reflector have forgotten or never really understood: SWR has NOTHING to do with resonance. 73, Bob, W5AH -- FAQ on WWW: http://www.contesting.com/ampsfaq.htm; /archives//html/Amps/1999-10/msg00090.html (9,106 bytes)
14. [AMPS] The Worldwide, No Holds Barred, SWR Quiz. (score: 1): Author: realex@flash.net (bob alexander); Date: Mon, 04 Oct 1999 19:35:08 -0500; ///snip/// -- Hi Rich, I think the main problem here is a lack of understanding as to what a standing wave is. It is simply a voltage or current on a line that changes amplitude as you move from one; /archives//html/Amps/1999-10/msg00166.html (11,347 bytes)
15. [AMPS] Hold on - SWR meter placement (score: 1): Author: realex@flash.net (bob alexander); Date: Fri, 08 Oct 1999 20:23:34 -0500; Rich, There are several possible reasons why your measurements "varied all over the place." 1. You have a defective SWR meter 2. You have a balanced load at the end of an unbalanced coax resulting in; /archives//html/Amps/1999-10/msg00322.html (10,012 bytes)
16. [AMPS] Have Cake & Eat it too (score: 1): Author: realex@flash.net (bob alexander); Date: Thu, 09 Sep 1999 19:43:06 -0500; Jonathan, Either throw the RS WAttmeter in the trash or replace all the diodes in it. 73, Bob, W5AH -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrati; /archives//html/Amps/1999-09/msg00061.html (9,093 bytes)
17. [AMPS] Have Cake & eat it too (score: 1): Author: realex@flash.net (bob alexander); Date: Fri, 10 Sep 1999 19:34:04 -0500; Jonathan, When SWR readings change from low power to high power it means one thing. Your wattmeter/SWR meter has bad diodes in it. Borrow another meter and recheck everything. You will get the same S; /archives//html/Amps/1999-09/msg00078.html (8,015 bytes)
18. [AMPS] SB-220 input circuit (score: 1): Author: realex@flash.net (bob alexander); Date: Tue, 03 Aug 1999 18:37:48 -0500; -- Replace C-32. It is open or partially open at 10 meters but works fine on lower freqs. That is why there is below normal grid and plate current with full drive. 73, Bob, W5AH -- FAQ on WWW: http:; /archives//html/Amps/1999-08/msg00080.html (8,668 bytes)
19. [AMPS] SB-220 input circuit (score: 1): Author: realex@flash.net (bob alexander); Date: Wed, 04 Aug 1999 06:09:45 -0500; -- Hi Pete, I have seen it 3 or 4 times. The first time was in 1977 shortly after I started work as the ham radio tech at the Heathkit store here in Dallas. The amp was a "warrenty" return and I spen; /archives//html/Amps/1999-08/msg00083.html (9,546 bytes)
20. [AMPS] Pi-Net math (score: 1): Author: realex@flash.net (bob alexander); Date: Thu, 12 Aug 1999 06:06:09 -0500; ? The problem here is that the Q contribution of C2 is ignored. The exact method takes into account the Q contribution of C2. The "exact" method isn't. C2 is not part of the input Z matching section; /archives//html/Amps/1999-08/msg00237.html (8,725 bytes)

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