[HBR] HR-67

[Helmut Usbeck]

On Friday 12 April 2002 15:44, Sandy and Kees Talen wrote:
> Relative to finding parts....BG Micro had 3 section FM tuning capacitors
> which measure 5-25pf per section and are a "good" substitute for the
> specified variable. 

BJ does't have any more and aren't sure if they're going to run into anymore. 
  emailed them about a month ago about them.

Also BC 453 IF transformers are 85Khz, can be
> moved up to 100Khz if you want (or 50Khz), have an adjustable coupling
> via that micarda rod out the top ("in" is overcoupled), they are readily
> available, and in my opion (and using the spectrum analyzer) are better
> than the JW Miller IF transformers (higher "Q", ceramic or mica base, air
> trimmer tuning, excellent shielding, top adjustment, variable coupling,
> etc).

I use a bc453 as a tunable IF for one of my receivers, the other bc453 I have 
is worth too much money to carve up into parts.  They're not as plentiful
or cheap as they once were.  At least as they once were.
>