|[AMRadio] Using Heath SB 610 Monitor Scope to
manualman at juno.com
Mon Feb 11 20:58:02 EST 2008
The Vertical input on the SB-614 is totally different then what's found
in the SB-610.
The SB-610 vertical input (for connecting to the IF output) circuitry has
three front end choices. From 1 KHz to 150 KHz, no input or output coils
are required. From 455 KHz to 2475 KHz, there in an output coil. For 3000
KHz to 6000 KHz, both an input and output coil are required.
The SB-620 not only has three separate mixer input choices, depending on
input frequency, but there are also changes required in the sweep
circuitry depending on the input frequency.
On Mon, 11 Feb 2008 16:20:15 -0800 "Bob Macklin" <macklinbob at msn.com>
> I think you have the SB-610 and SB-614 confused with the SB-620
> What you state is true of the SB-620.
> Bob Macklin
> Seattle, Wa,
> "Real Radios Glow in the Dark"
> ----- Original Message -----
> From: "Jim Wilhite" <w5jo at brightok.net>
> To: "Discussion of AM Radio in the Amateur Service"
> <amradio at mailman.qth.net>
> Sent: Monday, February 11, 2008 3:49 PM
> Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to
> monitormodulationonAM transmitter
> > To anyone considering an SB 610 or 614, keep in mind they must be
> > constructed to match the IF frequency of the receiver to which
> they will
> > be interfaced.
> > Some of them were built to work with the Heath receivers with the
> 3 meg
> > IF and those that were built for 455 Kc. had the coils that would
> do so.
> > If you find one for with the 3 Kc IF coils, it won't work properly
> > a NC 300 or NC 183D for example. Heath packaged the coils for
> both with
> > the units and the builder chose which he wanted. I doubt you
> > receive the coils that were not used during construction. Check
> > out before you find you have something that won't work with your
> > receiver.
> > Jim/W5JO
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