Hello Memebers,

I was hoping somebody might have some information on a 1933 McMichael radio. I got some info off the radio museum site but no circuit diagram. looks like it is battery powered and the owner would like it going. Not having done this sort of set , is it a viable option to convert to AC . Any leads appreciated.

Regards
Vic

Sounds like badge engineering. Valves are?

Sometimes it is cheaper to start with a battery pack (home made) until you get it going.

Marc

I have a McMichael portable. They were made in UK and some did make it out here.
Information is sketchy on these. Its out there, just not free.
Post a photo and we can try and ID it.


ben

Thanks for the replies,

I did find a site I was able to purchase information and schematic for 1.99 pounds and it was a big help.

But the decision is to whether I use batteries or has someone out there made up power supplies for these.

Cheers
Vic

I'm not a believer in converting sets to mains operation as it devalues the set so I can't say I've done it. A good alternative (to save on batteries) would be to make a power supply that covers the two battery voltages.

Some collectors make a supply that covers 2, 4, 6 and 6.3 volts, covering A-batteries and the occasional 4 or 6 volt vibrator set plus 63, 67.5, 90 (and what ever else is needed) volts for the secondaries. When the supply is connected to the radio the operator simply selects the appropriate voltages via rotary control knobs.

The DC outputs would need to be regulated and very well filtered to keep mains hum out of the loudspeaker.

I have bought commercially and I have built them. I have a friend that collects; some we have made a battery pack for; some I have made a dedicated PSU for and I have made a single PSU for several, where the individual set has an 8 PIn valve base that plugs into the PSU and will only pick up from the pins, voltages specific to it.

But at the end of the day, one needs the circuit to see how to attack it.

Marc