NEED HELP ON IF FILTERS (or, "Put a TIGER in your 'Tank'")...

[Diane Swynar]

Dee...

For something VERY simple, VERY effective, and VERY unobtrusive, you can't
do better than an old Heathkit Q-multiplier, for my money (and from my own
personal experience).

ANY of the models will do, but remember that the earliest version--the QF-1-
--will need a source of power (NOT self-sufficient).

As that certain TV tiger would say, "...They're G-R-E-A-T!!!!". Hi

~73~ Eddy VE3CUI - VE3XZ






> Fellow BA'rs
> Started an interesting project. National HRO-50T. Real clean radio &
> has been recapped with new stuff. Got it working pretty well. Still
> have problems with 3 of the coils sets to do yet but radio senseitivity
> not bad. This is a very stable radio, almost no drift! However, it
> needs help in the IF. Since it is single conversion, adjacent channel
> rejection leaves something to be desired. Seems the easest way is a
> 455kc 8 pole filter @ 6kc (and maybe another @ 4kc) for AM mode.
> Problem is the cost!!! Looking @ ceramic filters like we used in modern
> FM transceivers. But they dont have the dynamic range that crystal
> filters have. Double conversion is a possibility with miniture
> circuitry @ 60 kc. (limited space). Any one have any experience with
> sooping up IFs? Any place on the internet for this kind of project?
> 73 es Dee
> W4PNT
> http://w4pnt.8k.com
> Patty & Dee's Marina Collectors of "firebottle" radios
> Dee Almquist
> 534 W. Main St.
> Waynesboro, Va. 22980
> (540)249-3161 Cell: (540)480-7179

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