On Dec 27 2009, 3:34*pm, Gene wrote:
Season`s greetings to all...
While in England in `91, I picked up a Ford motor car radio receiver.
P21 79GB-18K810 *HA . * Two band , LW & MW .. (166 KHz - 285 KHz LW
& *666KHz *- 1500Khz MW *+/- ) .I would like to extend the LW band as
high in frequency as i can , and the MW band as low as i can in
frequency..I.F. is 465 kHz...Object : To create a beacon ( 200KHz -
400 KHz ) receiver...
Is there anyone out there that has any experience , and or ideas with
what i have in mind ?

TIA * Gene * WB7NGI

Based on the OP. Postulating some numbers!

The Long Wave band 166 to 285. That's ratio of 1:1.7
The local oscillator with an IF of 465 would be (465 + 166 = 631) to
(465 + 285 = 750) a ratio of only 1:1.18!

The Medium Wave band 666 to 1500. A ratio of 1:2.25
The local oscillator being (465 + 666 = 1131) to (465 + 1500 = 1965) a
ratio of 1:1.73.

To tune 200 to 400 khz. is a ratio of (at least) 1:2. And retaining
an IF of 465 would require, say, a local oscillator variation from
(465 + 200 = 665) to (465 + 400 = 865) a ratio of 865/665 or 1:1.3

However those 200 to 400 kilohertz aircraft beacon radios, covering
specifically 200 to 400 are quite often on eBay!

Another alternative would be a 190 to 550 kilo hertz ARC-5/BC453
'Command radio'. Those have 12 volt tubes that can easily be rewired
from 24 to 12 volt operation.

Another quicker alternative would be some form of small solid state
converter tuned or fixed into the Med. Wave band.