R103A receiver - UK Vintage Radio Repair and Restoration Discussion Forum

derek.ireland · 22nd Dec 2014, 5:50 pm

Can any body help please. I need the IF frequency of the R103A, ZA11053 receiver 1947. Also the maker. M R O. what does it stand for, any info would be very helpful. Thanks

g4aaw pete · 22nd Dec 2014, 6:27 pm

Hello Derek

If the R103 Mk1 is similar, the info on the VMARS site may help.
The 2nd document indicates 465Khz as the I.F.

R109 Mk1 at
http://www.vmarsmanuals.co.uk/archiv...ER_EZ122_1.pdf

also

http://www.vmarsmanuals.co.uk/archiv...ER_EZ124_1.pdf

Regards
Pete

derek.ireland · 22nd Dec 2014, 8:05 pm

Thanks Pete, 465khz seems OK, its nearer 500khz at the moment. The radio on the site is a mk1 and it's nothing like the A. Still wondering who MRO were. After almost a day reforming, its running a treat. May leave alignment for another day. Thanks again everyone

M0SOE_Bruce · 23rd Dec 2014, 8:57 am

The IF of the A version is 465 kHz, same as the plain 103.

Don't know who MRO is but the R103 was made by Masterradio Ltd. Perhaps that is the 3 letter code for same.

22nd Dec 2014, 5:50 pm	#1
derek.ireland Tetrode Join Date: Sep 2007 Location: Norwich, Norfolk, UK. Posts: 50	R103A receiver Can any body help please. I need the IF frequency of the R103A, ZA11053 receiver 1947. Also the maker. M R O. what does it stand for, any info would be very helpful. Thanks

22nd Dec 2014, 6:27 pm	#2
g4aaw pete Heptode Join Date: Jan 2008 Location: Birchington Kent, UK. Posts: 596	Re: R103a receiver Hello Derek If the R103 Mk1 is similar, the info on the VMARS site may help. The 2nd document indicates 465Khz as the I.F. R109 Mk1 at http://www.vmarsmanuals.co.uk/archiv...ER_EZ122_1.pdf also http://www.vmarsmanuals.co.uk/archiv...ER_EZ124_1.pdf Regards Pete

22nd Dec 2014, 8:05 pm	#3
derek.ireland Tetrode Join Date: Sep 2007 Location: Norwich, Norfolk, UK. Posts: 50	Re: R103a receiver Thanks Pete, 465khz seems OK, its nearer 500khz at the moment. The radio on the site is a mk1 and it's nothing like the A. Still wondering who MRO were. After almost a day reforming, its running a treat. May leave alignment for another day. Thanks again everyone

23rd Dec 2014, 8:57 am	#4
M0SOE_Bruce Pentode Join Date: May 2013 Location: Deal, Kent, UK. Posts: 139	Re: R103A receiver The IF of the A version is 465 kHz, same as the plain 103. Don't know who MRO is but the R103 was made by Masterradio Ltd. Perhaps that is the 3 letter code for same.