Thread: R1392 Crystals
View Single Post
Old 2nd Mar 2012, 8:41 pm   #5
Metropolitan
Retired Dormant Member
 
Join Date: Jan 2012
Location: Worksop, Notts.
Posts: 5
Default Re: R1392 Crystals

Hello everyone,
Many thanks for replies and helpfull info. According to the link provided by G8HQP, the R1392 is asingle conversion superhet single channel xtal locked receiver with front panel tuning to obviate quick channel changes, Frequently, these receivers were convertaed to VFO operation.
So i assume my R1392 does not have VFO and will need a different xtal for each airfield frequency that I visit. (On WW2 re-enactment w/e's and Classic Wheels and Wings shows).
The formula for calculating the xtal frequency is.... fcrystal = fsignal -4.86 divided by 18
I've since been told that the R1132 receiver would have been a better set as it has VFO control, but at it's highest frequency of 125 Mc/s. it doesn't extend high enough to cover some of the airfields I visit. eg Sandtoft 130.425 and Sturgate 130.300 Mc/s.
I'll keep hunting for the xtals. Newark Air Museum Aero-jumble tomorrow Saturday 3rd March.
Cheers,
Harry Webster.
Metropolitan is offline