(08-08-2013, 08:51 PM)pwdrive Wrote: [This CR.150] appears to have the 1st. local osc. intact. Do you have any info on the CR150? All I can find free on-line manual-wise is the CR150/3, which the receiver that I have definitely isn't. There's no provision for diversity connections on it so far as I can see and no user antenna trimmer control.
Lawrence.
I have delved into my archives and unearthed the following - which is abridged: the salient features that differentiate the variants.
First, the base model: CR.150.
Freq. range = 2 Mc/s to 60 Mc/s in 5 bands.
Dual conversion s/het. 1st. IF = 1600 kc/s; 2nd. IF = 465 kc/s.
Image rejection ratio @ 30 Mc/s = 40 dB; @ 60 Mc/s = 20 dB.
Bandwidth variable: 100 c/s to 10 kc/s in 5 switchable steps.
Stabilized HT, (but my notes also state that an external PSU is required.
Perhaps that 'stabilized HT' remark refers to the oscillators, which, again, according to my notes, are temp. stabilized)Crystal calibrator.
S-meter.
Secondly, CR.150 / 2. As CR.150, but . . .
Freq. range = 1.5 Mc/s to 22 Mc/s in 4 bands.
Thirdly, the receiver which yours isn't: CR.150 / 3.
As CR.150, but . . .
Crystal-controlled 1st. osc. (Therefore receiver was designed for fixed frequency use).
Front panel aerial trimmer.
Widest B/W setting is 13 kc/s.
My notes also state that the CR.150 is quite a rare receiver and that few of them were ever manufactured.
So, on the basis of those summary specs. and what you have told us about yours, it's either a CR. 150 or a CR.150 / 2. A glance at the front panel bandwidth switch will determine which.
Al. / Aug. 9, 2013 //
