[AMRadio] FM transmitter

[Brett gazdzinski]

Yes, its got metal walls between the coils linking the RF amp
and mixer stages, how it gets any RF through is hard to figure.

I think its also got metal walls between the antenna input and the  rf amp,
yet seems quite sensitive on the lower bands.

Good audio, with a nice modern full range speaker in the front, the
cabinet makes a good speaker cabinet.

Brett

 

> -----Original Message-----
> From: amradio-bounces at mailman.qth.net 
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of Donald Chester
> Sent: Saturday, March 04, 2006 3:14 AM
> To: amradio at mailman.qth.net
> Subject: Re: [AMRadio] FM transmitter
> 
> 
> >
> >They did monitor for the local oscillators. I saw them on more
> >than one occasion patrolling with their highly directional antenna.
> >It was a rotatable dipole with lots of loading inductance along the
> >element. It was conical shaped tapering to a narrow outer end, and
> >was about 4-6 feet in length. It looked quite impressinve painted
> >in G.P.O. green livery the same color as the vehicle - a Morris MInor
> >1000 van! Same kind of vehicle as a VW bug only British - smaller and
> >lower to the ground.
> 
> I suppose a Scott SLRM would be difficult to detect.  Not quite a 
> "communications" receiver, it is basically a high quality multiband 
> broadcast radio with special shielding to keep the local 
> oscillators from 
> radiating.  They were used on the Liberty Ships in WW2 to provide 
> entertainment for the crew, while protecting the ship from 
> detection by the 
> enemy homing in on the local oscillators.
> My father-in-law rescued one from going to the dump and 
> lugged it all the 
> way from Arizona and dropped it off here.  An interesting 
> piece of gear.
> 
> Don k4kyv
> 
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