[Milsurplus] RT-128/ARC-21 vs RT-311/ARC-38
grasshopper
grasshopper at epix.net
Mon Mar 21 18:23:24 EDT 2016
Jack,
Suspect it is fairly common and wonder how many radio's still
worked, or were working well enough to be put in service? I found a wiring
error on a Motorola R390A IF deck that impact AGC functionality. Was it one
IF deck, or a whole series, one wonders...
Steve
Kd3ht
-----Original Message-----
From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of
Jack Antonio
Sent: Monday, March 21, 2016 4:13 PM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] RT-128/ARC-21 vs RT-311/ARC-38
On 3/21/2016 4:39 PM, antqradio at sbcglobal.net wrote:
> Ray
> I cannot find any published reliability data on the ARC-38, 618S or
> 618T transceivers. Everything out there seems to be opinion with no
> actual data to backup the claim so I cannot comment about the better
> reliability you mention.
>
While working on my RT-311, I wound up buying a naked chassis from Fair,
to strip the connectors out of to make
extender cables.
While removing the connectors, I found a total of 3 unsoldered
connections, hidden by the insulated sleeving.
After the extension cables were made, I discovered the cause of the
intermittent in the SMO, which was a busted
wire in one of the blue Amphenol hex connectors. Looked like the wire
was nicked when the insulation was stripped.
Just wonder how much of the reliability problems with this vintage of
radio were due to assembly issues like this.
Jack Antonio WA7DIA/4
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