28-07-2015, 11:23 AM
I931 or 1932, an interesting TRF. I restored one a few years back - https://www.youtube.com/watch?v=p6vufuWHBd8
and as I recall, the interstage transformer was OC too. Obviously a common problem, very fine wire. I used either R/C coupling or I might have used the intact winding on the transformer in choke-capacity mode.
Set shouldn't be confused with the externally identical RS2, which uses a cone dynamic loudspeaker (not OPT) and somewhat different circuitry. The M23 came about because of the loss of design plans due to a severe fire at the Ekco works, which put the production of a replacement for the RS2 on hold, so the same cabinet moulds were used but with the updated chassis.
I once possessed an RS2. Because they are now scarce, they do find a better market than the more common M23 amongst collectors. Having a very sensitive cone LS, the RS2 versions work very well indeed, other than a loss of overall sound quality. Reaction helps, of course.
Very nice restoration, Trevor.
Tony
and as I recall, the interstage transformer was OC too. Obviously a common problem, very fine wire. I used either R/C coupling or I might have used the intact winding on the transformer in choke-capacity mode.
Set shouldn't be confused with the externally identical RS2, which uses a cone dynamic loudspeaker (not OPT) and somewhat different circuitry. The M23 came about because of the loss of design plans due to a severe fire at the Ekco works, which put the production of a replacement for the RS2 on hold, so the same cabinet moulds were used but with the updated chassis.
I once possessed an RS2. Because they are now scarce, they do find a better market than the more common M23 amongst collectors. Having a very sensitive cone LS, the RS2 versions work very well indeed, other than a loss of overall sound quality. Reaction helps, of course.
Very nice restoration, Trevor.
Tony
