[MRCA] Need Clean DAV Schematic

[Ray Fantini]

In some ways batteries suck, one of the snap clips on the multitude of nine volt batteries came off in Dayton this year during the net resulting in an emergency repair for my DAV pack but I still think that I will always go with a home built set of B batteries over a whiny inverter any day of the week. I will have to check the DAV tonight in preparation for Gilbert.

Ray F

From: Rob Flory [mailto:farmer.rob.flory at gmail.com]
Sent: Wednesday, September 18, 2013 8:33 AM
To: Ray Fantini; mrca
Subject: Re: [MRCA] Need Clean DAV Schematic

 I found the same thing with those capacitors.  I still pulled the battery when not in use.

My other battery problem in general is forgetting to pull them for years and years and ending up with a big corrosion mess.

RF

On Wed, Sep 18, 2013 at 7:26 AM, Ray Fantini <RAFANTINI at salisbury.edu<mailto:RAFANTINI at salisbury.edu>> wrote:

As long as you have it apart change the two big capacitors, C112 and C114 being that they leak and with C114 right across the screen supply it will suck down the B batteries. The B batteries are always connected to the radio when they are installed with the A battery being the only thing switched so any leakage in the set will drain the batteries as long as they are connected. Those two were the only week capacitors that I found in my DAV with all those little caps sealed in with the resistor networks being good.

Ray F

-----Original Message-----
From: mrca-bounces at mailman.qth.net<mailto:mrca-bounces at mailman.qth.net> [mailto:mrca-bounces at mailman.qth.net<mailto:mrca-bounces at mailman.qth.net>] On Behalf Of Al Klase
Sent: Tuesday, September 17, 2013 9:10 PM
To: mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>
Subject: Re: [MRCA] Need Clean DAV Schematic

Gang,

Thanks to an anonymous benefactor, I've obtained a schematic, and solved the problem.

FWIW, MAB modules do not work in DAV's

See you at Gilbert,
Al

On 9/17/2013 7:24 PM, Al Klase wrote:
> Folks,
>
> Can anyone send a clean scan of the DAV schematic?  I'm trying to get
> a set going for Breck's transmitter hunt at Gilbert.  300dpi TIFF or
> PNG should do the trick.
>
> I have a 22 MB manual scan from the web, but the drawing lack the
> necessary resolution.
>
> Al
>

--
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/


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