Dumb question - is the PBT in late rigs really at 9Mhz? It's not at 6.3Mhz?
73,
Barry N1EU
>From: Kevin L Anderson <k9iua@juno.com>
>Corsair I: 3 IF filters, same AGC system as Omni-C, dual conversion
> (IFs at 9 and 6.3 MHz and then back to 9 MHz for PBT), Corsair II
>(8/87): same basic receiver, 3 IF filters, dual conversion,
> stock 9 MHz IF filter upgraded to 8 poles, PBT,
> audio filter, NB?, transformer feedback amplifier stages before and
> after first mixer (diode ring), adds 3 selectable audio filters and
> a notch filter within the AGC loop to Corsair I
>
>Omni V (11/90): uses synthesizer rather than PTO; IFs at 9 and 6.3 MHz
> (and then back to 9 MHz for PBT, like Corsairs)
>Omni VI (1/93): added RIT, sidetone that follows CW offset, internal
> keyer, low pass DSP filter to reduce IF hiss instead of "tone control",
> increased microprocessor clock speed, crystal oven for xtal osc,
> minor changes in firmware controlled items
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