Amps
[Top] [All Lists]

Re: [Amps] AL-1200 Glitch Resistor

To: <amps@contesting.com>
Subject: Re: [Amps] AL-1200 Glitch Resistor
From: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 12 Apr 2015 09:10:10 -0400
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Carl,

Any idea when it went into production? I see it in the on-line parts list as P/N 10-10154 for $19.11 but I don’t see it on the current PDF schematic.

In this particular AL-1200, the only HV fault current limit is though the filament choke, plate choke, PCB traces, and wiring post HV filter cap board.

A single 1N5408 does exist between B- and chassis ground.

Their schematics need a thorough clean-up. I noticed several parts, off-sheet connect points, and module numbers that don't match-up. Some of this may be due to evolutionary changes.

Paul, W9AC

-----Original Message----- From: Carl
Sent: Sunday, April 12, 2015 8:45 AM
To: Paul Christensen ; amps@contesting.com
Subject: Re: [Amps] AL-1200 Glitch Resistor

See the photos of the current big Ameritron series. They use a big carbon
resistor that is in the parts list, sort of pricey however.

Carl
KM1H



----- Original Message ----- From: "Paul Christensen" <w9ac@arrl.net>
To: <amps@contesting.com>
Sent: Sunday, April 12, 2015 8:25 AM
Subject: [Amps] AL-1200 Glitch Resistor


I'm working on an AL-1200 for a friend. While finding the problem in the PS, I noticed that a glitch resistor is absent in the design that would otherwise limit HV fault current. I verified this on both the schematic and by tracing actual amp wiring. I was expecting a resistor (e.g., 50/50W) in the B- lead, or in the alternative, in the B+ lead with appropriate isolation. While the 3CX1200 may be statistically immune to flashover, it seems a good idea to include one to ensure that HV fault current is limited under all conditions.

Has anyone here added one to their AL-1200?

Paul, W9AC
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps


-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.5863 / Virus Database: 4328/9519 - Release Date: 04/12/15

_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
<Prev in Thread] Current Thread [Next in Thread>