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101. Re: [Amps] Plate Impedance, ARRL (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Wed, 26 Apr 2006 20:13:38 -0400; Very well put Phil. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-04/msg00391.html (10,932 bytes)
102. Re: [Amps] 3-1000Z - Filament Voltage (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Tue, 9 May 2006 23:03:05 -0400; You can't hurt a 3-1000Z unless you roll it off a desktop onto a concrete floor. Just set the filament voltage to 7.5 and go with it. I ran a pair of these tubes back in the 60's and 70's and never e; /archives//html/Amps/2006-05/msg00066.html (8,624 bytes)
103. Re: [Amps] LDG AT-100AMP (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Wed, 10 May 2006 14:22:01 -0400; I was probably one their first customer and I installed it in a Henry 4K Ultra. It works great. It even found an intermittent open in my HN connector on the output side of the amp. For $125 you can't; /archives//html/Amps/2006-05/msg00069.html (7,375 bytes)
104. [Amps] Henry 8K (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Wed, 17 May 2006 17:59:29 -0400; The original request on this topic was for some help on identifying where Henry used less than good components and less than good designs on the Henry 8K Ultra. As usual, this reflector jumped on thi; /archives//html/Amps/2006-05/msg00207.html (8,949 bytes)
105. Re: [Amps] adding second tube to AL1200 (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Wed, 17 May 2006 20:07:54 -0400; All of this proves my point about Ameritron amps. They make the Heathkit amps of yesteryear seems Collinsesque. When are you newcomer hams going to learn that anything that comes from MFJ is junk. I'; /archives//html/Amps/2006-05/msg00213.html (9,501 bytes)
106. Re: [Amps] RE : who needs it? Henry 8K (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Thu, 25 May 2006 11:03:47 -0400; I thought we had finished with this subject. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-05/msg00354.html (11,337 bytes)
107. Re: [Amps] Quad Tube 4cx800 hf amp (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Thu, 25 May 2006 22:02:43 -0400; It can be corrected by removing 2 of the tubes. A pair can easily run the legal limit ++. Bob W6TR -- Original Message -- From: "Manuel R. Alonso / KC4MNE" <kc4mne@bellsouth.net> To: <amps@contesting; /archives//html/Amps/2006-05/msg00360.html (8,162 bytes)
108. Re: [Amps] Quad Tube 4cx800 hf amp (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Thu, 25 May 2006 22:14:40 -0400; I tried that with a 3CX3000 amp and it didn't buy me much. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-05/msg00362.html (8,886 bytes)
109. Re: [Amps] LDG AT-100AMP (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Fri, 26 May 2006 16:36:27 -0400; LDG says that it will retune if the VSWR goes above 1.7:1. What's wrong with 1.2:1 as you are getting? Yours is working fine. Leave it alone. _______________________________________________ Amps mail; /archives//html/Amps/2006-05/msg00398.html (9,954 bytes)
110. Re: [Amps] twin 4CX-10 000D amplifier: multiple tubes (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Sun, 28 May 2006 16:36:59 -0400; Nice looking amp. I wonder how the 4 unshielded meters like all that RF. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/list; /archives//html/Amps/2006-05/msg00454.html (8,664 bytes)
111. [Amps] Henry 4K Ultra Mods (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Tue, 30 May 2006 14:58:03 -0400; I'm coming down the home stretch on my modifications to my 4K Ultra and I have some questions. What is the recommended zener diode for the bias circuit? The original 8877 design used a 1N2810 12V @ 5; /archives//html/Amps/2006-05/msg00517.html (7,210 bytes)
112. Re: [Amps] 4-1000A Input matching (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Thu, 8 Jun 2006 09:50:27 -0400; Try the LDG auto tuner. $130 and it works great. No hassles, no switching required. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/m; /archives//html/Amps/2006-06/msg00224.html (7,900 bytes)
113. Re: [Amps] 4-1000A Input matching (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Thu, 8 Jun 2006 09:54:11 -0400; He told you that it is running in grounded grid. At 6000VDC on the tube he is going to need at least 250W of drive in order to make it "come to life". Ken, I would like to see the RF deck. Can you se; /archives//html/Amps/2006-06/msg00225.html (9,843 bytes)
114. [Amps] 50W Zener Needed (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Thu, 22 Jun 2006 10:27:31 -0400; I need a 8.2 or 10 volt 50W zener in the TO-3 case, which mounts on the RF deck wall with both pins on the same side sticking thru into the interior of the RF chassis. If anyone has one, please respo; /archives//html/Amps/2006-06/msg00330.html (6,246 bytes)
115. [Amps] Henry 4K Shunt Resistor (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Thu, 22 Jun 2006 21:48:40 -0400; My manual for the 4K Ultra calls for the shunt resistor (R16) to be 470 ohms, 1 watt. Somebody crossed out the 470 and wrote in 1K, 1 watt. Can someone tell me what the plate shunt resistor should be; /archives//html/Amps/2006-06/msg00331.html (6,852 bytes)
116. Re: [Amps] Henry 4K Shunt Resistor (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Sat, 24 Jun 2006 10:26:31 -0400; Mine is also a very early unit as it has FD09 printed on the second floor of the power supply. According to Dennis, the guru of Henry amps, Faye Danza made all the power supplies and she numbered eac; /archives//html/Amps/2006-06/msg00347.html (8,211 bytes)
117. [Amps] Henry 4K-Ultra Circuit (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Tue, 27 Jun 2006 14:03:40 -0400; On the schematic of the power supply (page 25) it shows that R112 is 15 ohms 75 watts and R113 is 75 ohms 25 watts. On the list of parts on page 20 R112 and R113 are listed with the values reversed.; /archives//html/Amps/2006-06/msg00517.html (6,490 bytes)
118. [Amps] Henry 4K-Ultra Schematic Error (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Wed, 28 Jun 2006 22:24:09 -0400; I didn't get any replies to my original post so here it is again. On the schematic of the power supply (page 25) it shows that R112 is 15 ohms 75 watts and R113 is 75 ohms 25 watts. On the list of pa; /archives//html/Amps/2006-06/msg00612.html (7,284 bytes)
119. [Amps] W1XE (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Sun, 2 Jul 2006 13:33:26 -0400; I forgot to mention that he lives in the Boulder. CO area. Bob _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-07/msg00060.html (6,017 bytes)
120. [Amps] W1XE (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Sun, 2 Jul 2006 13:27:12 -0400; Does anyone know George Noyes W1XE? I bought a used tube from him on ebay and can't get him to answer any of my mails to tell me what the shipping cost will be. Thanks, Bob W6TR _____________________; /archives//html/Amps/2006-07/msg00061.html (6,435 bytes)

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