Maybe some said already... the Drake R-4C with Sherwood mods remains one of the
best ham receivers ever made. Many owners claim even higher rating.I had 2B
and still have TR-3.... Really great rigs and an important jump up in
performance for the ham market. Made ham history.73,
Charles Harpole
k4vud@hotmail.com
> From: garyschafer@comcast.net
> To: k7fm@teleport.com
> Date: Sun, 5 Jun 2011 12:15:45 -0400
> CC: amps@contesting.com
> Subject: Re: [Amps] FW: [Boatanchors] Best Boatanchor 160-10mReceiversforSSB?
>
> The RF gain control does indeed control the RF stage on the 2B.
>
> If you have problems with overload on those receivers you most likely have a
> leaky capacitor somewhere in the AGC circuit or a tube with grid to cathode
> leakage.
> the AGC or AVC as they call it, is a very high impedance circuit and any
> slight leakage screws up the whole thing. You can not even put a high
> impedance voltmeter or VTVM anywhere on the AGC line as it will load it
> down.
>
> I have all 3 of the early drake receivers, the 1A, 2A and 2B. They all
> operate similar. In most cases if the AGC is working properly you never have
> to touch the RF gain control. Just leave it wide open and everything works
> fine.
>
> The Drake 1A actually has better dial calibration the 2 series even though
> the 2 has the calibrated? Dial escuson which in my opinion is about useless.
> You can interpolate the dial on the 1A better than on the 2.
>
> Sensitivity is great but selectivity is not great. The nose of the filters
> are pretty good but skirt selectivity is not good. A strong adjacent
> frequency will eat it up.
>
> The 2A is actually the best receiver for SW listening as the AM filter is
> wider on it than on the 2B. the 2B is next to unusable on AM as it is too
> narrow.
>
> 73
> Gary K4FMX
>
> > -----Original Message-----
> > From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> > On Behalf Of k7fm
> > Sent: Sunday, June 05, 2011 9:38 AM
> > Cc: amps@contesting.com
> > Subject: Re: [Amps] FW: [Boatanchors] Best Boatanchor 160-
> > 10mReceiversforSSB?
> >
> > The Drake 2B has a serious design flaw. The rf gain control does not
> > reduce
> > gain of the rf amplifier tube, and as Carl said, it overloads severely.
> > If
> > the radio overloads, turning down the rf gain has no effect. I had a
> > neighbor running legal limit that tore the 2B up. I removed the rf gain
> > control and left it fixed at maximum gain, then installed a switchable
> > attenuator in the hole. That solved the problem.
> >
> > And, to keep this amp related, the problem only occurred when he had his
> > amp
> > running - there, I complied.
> >
> > 73, Colin K7FM
> >
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> > Amps@contesting.com
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