[TMC] MSR-8 question

[Nick England]

According to the manuals, MSR-8 (500 kc) is identical to MSR-4 (455kc)
except that the crystals are 483 & 517 kc instead of 438 & 472 kc. Also the
first oscillator in MANUAL mode (bandspread) is aligned with these
frequencies (adjust T2 & C-29). You can even see that the MSR-8 manual is
an MSR-4 one with the old frequencies whited out and retyped with the new
ones.

On these converters, the IF input is untuned and the first oscillator in
CRYSTAL mode is untuned so you can install crystals to cover any IF input
from 200kc to 1.5mc. The first oscillator in MANUAL mode needs to be
aligned and requires some change of components if you get too far away from
455kc.

The MSR-3 is for 200kc IF's and has different oscillator tank components
(Z-3). I have a military MSR-3 (CV-657A/URR) but haven't ever seen an MSR-8.

Cheers,
Nick K4NYW
www.navy-radio.com/rcvr-ssb.htm


On Mon, Oct 14, 2013 at 10:20 PM, Richard Knoppow
<1oldlens1 at ix.netcom.com>wrote:

>     One of the TMC price lists on K4OZY's web site shows an MSR-8. This is
> described as being the same as the MSR-4 but for 500 khz.  I wonder if
> anyone has ever seen one. Presumably it was meant to work with a 51J series
> receiver although I think there are others with 500 khz IF's. Before seeing
> this price list I didn't know such a thing existed. I wonder if anyone here
> has ever used one with a 51J and, if so, how it worked.
>
>
> --
> Richard Knoppow
> Los Angeles
> WB6KBL
> dickburk at ix.netcom.com
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