[MRCA] In Search of Hen's Teeth

[Al Klase]

Hi Ray,

Well, it has a lot in common  with the RF-301A from studying the 
manual.  You can tune it up on synth spurs if you're not careful.

They got rid of the tubes in the RX front end.  The TX is a 4604 
(quick-heat 12-volt 6146) driven by a 7905.  Makes about 50 watts PEP.  
Of course, still has a DC-DC converter, but only on transmit.

I'm a little confused with the audio accessories.  The 7-pin connector 
has an input for both carbon and dynamic mic, but the dynamic input 
lacks a credible mic preamp.  There is 12 volts on the connector.  Did 
they use some sort of amplified mic?  I cobbled up a connector 
replacement, and built  a dongle that contains the Plessy VOGAD IC used 
in the Transworld TW-100.  This way I can use the modern military 
accessories.

I got reasonable reports on Moose and Squirrel today.

Regards,
Al

On 4/9/2012 1:17 PM, Ray Fantini wrote:
> Looked at the pictures and that thing don't look nothing like a regular 301, no tubes? Maybe a little better board layout. Hope they don't use the same injection and mixing scheme as the 301 along with those gold plated fork connectors, but looking at the pictures though I saw signs of both. The good thing is yours works, and being solid state eliminates the DC to DC converter. What's the power output of that radio?
>
> RF
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-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/