[HBR] Slide Rule dials

[Sandy and Kees Talen]

Found out that Heathkit SB series equipment (tube type) has 3/4" 
solderable pulleys on the preselector shaft. These Heathkit units 
are quite common, many are parts only units, and Marty has 
agreed to send me some.  The reduction of a Jackson Bros vernier 
is actually 6.4:1 (3.2 turns stop-to-stop) so if you mount stacked 
drives to the tuning capacitor to reduce binding and for mechanical 
rigidity, solder the pulley on the second drive's shaft, you have a 
7.5" dial cord travel with 20.5 dial turns stop-to-stop. The is very 
good ham band only tuning (for 500Khz per segments). The 898
Eddystone has a 110:1 tuning rate, or 55 turns stop-to-stop which
is actually too slow for hamband tuning but great for shortwave 
tuning (several Mhz per segnment) ...my opinion, your's may vary.

Works for me, should for OK on a HBR-16 or HBR-12 size unit.

I'm going to try it on an HBR-12. 

Does anyone have any of the JW Miller 1709 or 1710 IF cans. I have
several of the ARC/5 85Khz IFs but they will be too large.

73s  Kees K5BCQ