In message
, Brian
Reay writes
Brian Howie wrote:
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

DIJ

So it still doesn't cover 60m.

As for side bands being the wrong way around, a popular misconception. As I
recall it came up a few
months back and was discussed at some length. Jeff explained it rather
well, as I recall.


VFO is 8.7to 9.2 and 2nd IF is 3. 180

Quick and dirty sum.

VF0 is set to 9
Carrier is 3MHZ tone is 1KHz

USB is 3.001 LSB is 2.999

9-3 = 6

1KHz tone

USB 9-3.001 = 5.999 LSB in IF

LSB

9-.2.9.999 = 6.001 USB in IF

So the sidebands are reversed in tunable IF

for 14MHz conversion crystal is about 20MHz , when the tunable IF is
subtracted, the sidebands are the right way round again.

Other rigs are probably different. Yes and this one doesn't cover
60m.Enthusiasts might want to try it for different Yaesu rigs. The FT101
looks the same. Some with the 9MHz IF might work out differently.

Brian


--
Brian Howie