[600MRG] By the way --- your receiving equipment --- BC-453/4 Modifications

[Bill Cromwell]

Hi Dick,

Thanks for the pointers. I have been gradually unmodifying my ARC5 
radios so I am probably not going do all of those things. I was using my 
plate supply for a lot of other things and the decades old power 
transformer finally died. The heater transformer (24 volts) was 
purchased brand new and is still healthy. I bought a new plate 
transformer too. When I get time to rebuild the power supply I'll be 
apply regulated DC at 24 volts on the heaters and around about 120 
volts, regulated DC to B+.

73,

Bill  KU8H


On 11/02/2014 11:48 PM, dick.bingham wrote:
> Hello Bill -KU8H
>
> Regarding the BC453 receiver, you can knock-out the dynamotor connector and replace it with an 8-pin octal socket to add a 35Z5 rectifier tube to the tube list.
>
> Connect all of the tube filaments in series and wire the 35Z5 as a rectifier to replace the DC output from the dynamotor and you are good to go. USE an isolation transformer to connect the converted BC453's now almost 110-volt worth of filaments and the 35Z5 rectifier to 110VAC.
>
> My "Elmer", W7CVI, modified my 454 receiver (3-6MHz) back in 1954 and it was my Novice/General Class radio for many years.
>
> One more thing you can do with the modified 454 is to drill a small diameter hole in the top of one of the IF-Transformers twist-on access covers. Then insert an insulated wire thru the hole in the cap and tie a single knot in the wire so it can not be inadvertently pulled out once carefully inserted into the IF-transformer. Then tune a BC-Band radio to the 454's IF frequency (1415KHz if I remember correctly) and listen to the signals to which the 454 is tuned to receive.
>   
> 73 de Dick/w7wkr and wd2xsh-26 CN98pi
> ---------------------------------------------------------------------------------------------