[TMC] AN/FRR-49 aka FFR-502 variant

[WA5CAB at cs.com]

Roy, et al,

Does anyone know what 7199 and 5842 cross to (like 6AK5W/5654 or 6BA6W/5749, 
etc.)?  I don't think that I ever heard of them.  Field Change 4-AN/FRR-49(V) 
and Field Change 3-AN/FRR-502 made some tube type changes but they were 6AK5 
and 6AG5 to 6BA6.  Reported in T-5 to NAVSHIPS 92786A dated 17 July 1964.  
Those are the only tube type changes that anything that I have shows.

In a message dated 6/7/2004 6:48:13 PM Central Daylight Time, 
telegrapher at att.net writes: 
> >
> >TMC-ers, 
> >
> >(Pardon if this has appeared here - I've been on no-mail for a while): 
> >
> >I've received a query from Greg White, VE3FAX, "G.White" 
> >asking about a variant of the FFR-49 receiver: 
> >
> >>hi, i am looking for info on the frr49. 
> >>There was a manual I downloaded for it, but it doeasnt show the correct 
> >>tube layout for my version, which used the 7199 tube and and a 5842 , 
> >>These tubes were then repalced be different ones. 
> >>
> >>Do you have any info on the 49 unit and the tube switch that took place on 
> 
> >>some production models? 
> >

73
Robert Downs - Houston
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