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References: [ +from:robrk@nidhog.net: 179 ]

Total 179 documents matching your query.

61. Re: [Amps] Check out This Ebay Amplifier system (score: 1)
Author: robrk@nidhog.net
Date: Thu, 8 Jul 2010 16:12:47 -0400 (EDT)
Doesn't say what Heathkit. What's the antenna tuner? I'm sure it will handle the amp.... -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean
/archives//html/Amps/2010-07/msg00085.html (8,321 bytes)

62. Re: [Amps] Comparison of PCB-mount RF relays (score: 1)
Author: Robrk <robrk@nidhog.net>
Date: Sat, 7 Aug 2010 14:39:34 -0400
I have a Motorola manual, from the 70's, what is an 8877, 2 to 18 mhz HF amp, using relays for the Pi switching. Part list says "special modified relay". The fuzzy photo looks like just 10 amp contac
/archives//html/Amps/2010-08/msg00080.html (9,111 bytes)

63. Re: [Amps] Labeling panels (score: 1)
Author: RK <robrk@nidhog.net>
Date: Thu, 19 Aug 2010 00:23:49 -0400
Google "decals". Past my bed time to do it for you. Somebody makes the decal paper for your inkjet. Ever do the plastic Revel models, as a kid? -- This message has been scanned for viruses and danger
/archives//html/Amps/2010-08/msg00315.html (6,571 bytes)

64. Re: [Amps] Autotune amplifier. How to implement actuator / system for tank switching? (score: 1)
Author: Robert Morris <robrk@nidhog.net>
Date: Sat, 11 Sep 2010 17:05:44 -0400
I made mention of this a month ago on a similar thread. I have a 1976 vintage Motorola manual of an 8877 HF amp using smallish, open frame relays to switch the taps on a PiL coil. Tried to get someon
/archives//html/Amps/2010-09/msg00092.html (7,887 bytes)

65. Re: [Amps] HF AMP Issues questions (score: 1)
Author: Robert Morris <robrk@nidhog.net>
Date: Sun, 19 Sep 2010 13:27:21 -0400
Did you move the load cap? Put radio on cw, 50 watts out, send 20wpm dots and tune for max out using both caps. With cw dots you are "pulse" tuning at 30% duty. Reverse design it. Measure the coil an
/archives//html/Amps/2010-09/msg00222.html (7,293 bytes)

66. Re: [Amps] HF AMP Issues questions (score: 1)
Author: Robert Morris <robrk@nidhog.net>
Date: Sun, 19 Sep 2010 21:27:51 -0400
BUT you can if you have a straight key and any wattmeter (or an FM button on the radio). -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean
/archives//html/Amps/2010-09/msg00227.html (7,526 bytes)

67. Re: [Amps] large Thordarson plate transformer ID (score: 1)
Author: Robert Morris <robrk@nidhog.net>
Date: Tue, 21 Sep 2010 13:20:25 -0400
It's listed in their 1938 catalog... $85.00. And for those of us that can spell 'Google' there is a payback, finding a nice, informative site. http://www.bunkerofdoom.com/xfm/ -- This message has bee
/archives//html/Amps/2010-09/msg00246.html (6,885 bytes)

68. Re: [Amps] Pulse tuning (score: 1)
Author: Robrk <robrk@nidhog.net>
Date: Thu, 23 Sep 2010 09:03:57 -0400
200 and 600 seem a bit low. Wouldn't think 200 would pass through your audio chain or the IF filter. Maybe try 800 and 1200. I hear 1004 in my sleep, after 30 years of point to point microwave testin
/archives//html/Amps/2010-09/msg00278.html (13,242 bytes)

69. Re: [Amps] Questions from a beginner (score: 1)
Author: Robert Morris <robrk@nidhog.net>
Date: Mon, 4 Oct 2010 23:40:37 -0400
This is in response to Eric, wanting to add an amplifier to his Icom 703+. Eric, there is a major problem. The Icom 703+ is a qrp rig, with an output of 5 or 10 watts. At the power level , you may be
/archives//html/Amps/2010-10/msg00020.html (7,932 bytes)

70. Re: [Amps] 6146 via 572b's (score: 1)
Author: Robert Morris <robrk@nidhog.net>
Date: Tue, 12 Oct 2010 15:12:28 -0400
Go look for grid driven, class AB1 amp designs. Any number of tubes from 2E26, 6146, 4X250, 4-400, 4-1000, on and on will take your 5 watts and make 30 or 3000 watts. The added complexity is the need
/archives//html/Amps/2010-10/msg00195.html (8,230 bytes)

71. Re: [Amps] AL-82 Blowing fuses on startup (score: 1)
Author: Robrk <robrk@nidhog.net>
Date: Fri, 26 Nov 2010 19:23:20 -0500
A new fuse ? Sent from my iPad -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. _______________________________________________ Amps mai
/archives//html/Amps/2010-11/msg00497.html (11,321 bytes)

72. Re: [Amps] SR-410A (score: 1)
Author: "R. Morris" <robrk@nidhog.net>
Date: Sun, 23 Jan 2011 22:13:09 -0500
Things were designed when the world (our part) was 115/230 volts. As Carl asked, is it a choke input, what would be .9 x the secondary. I have a couple transformers marked 220. If you have taps put i
/archives//html/Amps/2011-01/msg00241.html (9,103 bytes)

73. Re: [Amps] Prefab Cabinets (score: 1)
Author: "R. Morris" <robrk@nidhog.net>
Date: Tue, 15 Feb 2011 13:25:33 -0500
Try here.... http://home.flash.net/~k3iwk/ Never have myself, just see the adds. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ______
/archives//html/Amps/2011-02/msg00128.html (7,347 bytes)

74. Re: [Amps] 4-1000 Bias (score: 1)
Author: Robrk <robrk@nidhog.net>
Date: Wed, 2 Mar 2011 17:09:46 -0500
Why is there "no signal" grid current? Sent from my iPad -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ______________________________
/archives//html/Amps/2011-03/msg00026.html (8,582 bytes)

75. Re: [Amps] 813 Amplifier Article (score: 1)
Author: "R. Morris" <robrk@nidhog.net>
Date: Wed, 30 Mar 2011 22:35:48 -0400
My '59 and '60 Handbooks are the bottom box, but B&W had the exact layout on the market as a factory amp. Lived five miles from the factory. Could walk in and buy stuff. -- This message has been scan
/archives//html/Amps/2011-03/msg00285.html (8,095 bytes)

76. Re: [Amps] FS: Amplifier Parts (score: 1)
Author: "R. Morris" <robrk@nidhog.net>
Date: Fri, 01 Apr 2011 12:22:39 -0400
Plays fine with Firefox on Linux and Safari on a Mac.... -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ______________________________
/archives//html/Amps/2011-04/msg00004.html (6,987 bytes)

77. Re: [Amps] Silver plated copper strap source anyone? (score: 1)
Author: "R. Morris" <robrk@nidhog.net>
Date: Tue, 05 Apr 2011 17:06:43 -0400
And their name might be ? -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. _______________________________________________ Amps mailing
/archives//html/Amps/2011-04/msg00191.html (7,244 bytes)

78. Re: [Amps] Transformer i.d. (score: 1)
Author: "R. Morris" <robrk@nidhog.net>
Date: Tue, 05 Apr 2011 22:48:36 -0400
The Henry books for the 4k and 4ka just say "Transformer", not even their own part numbers. Get out the variac or a filament transformer and feed the primary. -- This message has been scanned for vir
/archives//html/Amps/2011-04/msg00196.html (8,196 bytes)

79. Re: [Amps] Silver plated copper strap source anyone? (score: 1)
Author: "R. Morris" <robrk@nidhog.net>
Date: Tue, 05 Apr 2011 23:01:07 -0400
Thanks, I read "super" as an adjective. It cost more to go to our Metal Supermarket 'cause it's across the road from the Harbor Freight store. -- This message has been scanned for viruses and dangero
/archives//html/Amps/2011-04/msg00204.html (8,131 bytes)

80. Re: [Amps] Question #2: 4-125A linear amplifier (score: 1)
Author: Robrk <robrk@nidhog.net>
Date: Wed, 11 May 2011 22:55:05 -0400
Think the sockets are the same, leave room and 4-250/s or 4-400 can plug in with the same screen and bias volts. -- This message has been scanned for viruses and dangerous content by MailScanner, and
/archives//html/Amps/2011-05/msg00070.html (9,087 bytes)

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