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Total 8 documents matching your query.

1. [Amps] Alpha 9500 Repair (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 14 Sep 2015 06:32:51 -0400; The purpose of this post is to alert Alpha 9500 owners of what's likely an inevitable repair if the 8877 develops a cathode-to-grid short. Hopefully, this information will assist other 9500 owners wh; /archives//html/Amps/2015-09/msg00039.html (9,148 bytes)
2. [Amps] Alpha 9500 Repair (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Mon, 14 Sep 2015 23:57:41 -0700; Surprisingly, the on-line schematics from RKR Designs do NOT show the 8877; the page connectors must be studied to understand the 8877 connection points. Paul, W9AC Priceless. Aside from that, they r; /archives//html/Amps/2015-09/msg00040.html (6,835 bytes)
3. Re: [Amps] Alpha 9500 Repair (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Tue, 15 Sep 2015 08:10:29 -0700; -- ORIGINAL MESSAGE --(may be snipped) REPLY: Agreed. Arc protection is a weak point. I have owned two 9500's. The first one, about four years ago, arced when it was a few months old and blew out the; /archives//html/Amps/2015-09/msg00041.html (8,323 bytes)
4. Re: [Amps] Alpha 9500 Repair (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Tue, 15 Sep 2015 11:30:05 -0400; Bill, The two components mentioned are sourced up through the +40V supply. So, I'm not at all surprised an 8877 arc or K-to-grid short took out the supply. Pricing of the SPE 2K-FA is a bit more than; /archives//html/Amps/2015-09/msg00042.html (9,124 bytes)
5. Re: [Amps] Alpha 9500 Repair (score: 1): Author: Kevin Stover <kevin.stover@mediacombb.net>; Date: Tue, 15 Sep 2015 18:53:44 -0500; W6PQL has built a 1KW SSPA for 1.8 though 54MHz using a single BLF188XR's. They are dual transistor parts. He suggests that two such LDMOS parts throttled back to 750W per along with his splitter/com; /archives//html/Amps/2015-09/msg00043.html (9,082 bytes)
6. Re: [Amps] Alpha 9500 Repair (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Tue, 15 Sep 2015 18:24:04 -0700; -- ORIGINAL MESSAGE --(may be snipped) REPLY: There are lots of 50 V 60 A supplies (3 kW) on eBay that are surplus from the telecom industry at cheap prices, in the range of $40 or so. Search eBay fo; /archives//html/Amps/2015-09/msg00044.html (7,640 bytes)
7. Re: [Amps] Alpha 9500 Repair (score: 1): Author: Charles H <k4vud@hotmail.com>; Date: Wed, 16 Sep 2015 01:57:58 +0000; I owned a 9500 which blew up 3 times. Sold it after factory repair. Shipping and Alpha price drops caused me to lose about $4000 on that thing. I now have a SPE Expert 2K-FA, bought from Rome at less; /archives//html/Amps/2015-09/msg00045.html (12,106 bytes)
8. Re: [Amps] Alpha 9500 Repair (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Tue, 15 Sep 2015 20:59:52 -0700; -- ORIGINAL MESSAGE --(may be snipped) REPLY: Not quite what I'm looking for. 1. Not a true "brick on the key" amp at 1500 watts out. Close but no cigar. 2. Expensive. 73, Bill W6WRT ________________; /archives//html/Amps/2015-09/msg00047.html (7,914 bytes)

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