In message , Ian Jackson
writes
In message , Brian Howie
writes
In message , Jeefaw K. Effkay
writes
On 30/11/2014 13:16, gareth wrote:
Anyone who has a scrapped Yaesu / Sommerkamp HF rig from
30 years ago, or so, will find that for both TX and RX, the
tunable IF covers the 60m / 5MHz band.

The IF is not tunable. It's fixed at 9MHz. It's the VFO that covers
5.0 to 5.5MHz.



My FT560 has a tunable IF of 5.520 to 6.020MHz IF is 3.180MHz
-sidebands would be the wrong way round .

http://www.radiomanual.info/schemi/FTdx560_user.pdf

I've only had a quick look, but it looks like the first IF is a fixed
5.520 to 6.020MHz (wideband bandpass filter) - ie a sort-of roofing
filter, and not tuneable.


Yes it's wideband but the vfo is 9MHz and together with thie 3MHz IF
selects the frequency within the pass-band . 9-3 =6
--
Brian Howie