[TMC] FFR's

[Richard Knoppow]

    From what I can get from the catalog these were intended to 
be adjustable fixed frequency receivers for use in double or 
triple diversity set ups. They would provide the necessary 
features of something like an SP-600-JX or GPR-90 allowing either 
manual tuning or crystal control but not have the extras of a 
general purpose receiver that are not needed for the specialized 
application.  There are fixed frequency receivers that offer 
crystal control but where all the RF tuning is manual. Something 
like the FRR would offer an easier change of frequency. Probably 
selectivity and other features are included in the external 
adaptors or combiners.

On 6/17/2019 5:05 AM, Roy Morgan wrote:
> Andy,
> 
> Yes, there are a couple of things about the FFR radios that make them not so wonderful:
> 
> - they are one-frequency things - you find your station and leave it there.
> - tuning around is not easy - the tuning system is crude.
> - crystal control requires a different crystal for each desired frequency
> - the selectivity may leave a lot to be desired - I don’t remember what bandwidth they have.
> - they are sort of big and heavy
> - the likely most desirable frequency to monitor (500 kc) works with a plug-in that is hard to find.
> 
> I *think* the radio I had here was lost in a disaster some time ago, so mine is no longer here.  I got mine for free by seeing it lying on the pavement at the local trash transfer station years ago.  I scoffed it up lickety split and never used it much.
> 
> Roy

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL