Re: SSB info
- The resonators are known to often be way off frequency- enough to make
sideband reception seem dead. The BFO uses a simple Colpitts
oscillator and substituting a crystal should work fine. An old
miniature 455 IF can's primary is also a simple 'bolt in' and you can
tune it to what works best or you can make make it variable with a
varicap and a pot (see photos). If you install a good narrow SB
filter, you will need to move the BFO frequency anyway as Tom indicates.
Substituting an IF can for the bad resonator is the cheapest, fastest
way to restore operation. A crystal is a neater solution if you can
find one. Good luck.
KD4FNC Bill Beamon
--- In RADIOSHACKDX394@yahoogroups.com, "Danny" <dannibou@y...> wrote:
> > Does that help? For more, see my article on Understanding the
> Principles of Frequency Tuning in the DX-394 in the Files section.
> > 73, Tom VE3MEO
> Hi Tom and thanks for your help. It's clear and easily
> understandable. I wonder if I can replace the resonator by a crystal
> on the same frequency? I'll try this later unless you tell me that it
> wont work at all. These resonators are often out of frequency and I
> think that a crystal could resolve the problem. Regards Danny