Vidor A/C - battery Portble Radio CN426

[kevin.Hoyland]

[attachment=2713][attachment=2712][attachment=2711]Hello.
I have just been given this radio by a friend and he says it is not working so it will go on the list to be put back in working order. It works from 240 volts and will work from a 90 volt battery L5536 and a 7.5volt battery L5060. Made in 1953 and the price was £13-5s.
Regards Kev.

[Steve_P]

Not working. Customers are alive and well I see.

Anyway, this is either just on mains or possibly a valve has said it's last!

Cheers,

Steve P.

[tiv48]

i like these vidor sets and as yours has a mains transformer no need to mess about with batteries , some of the valves are getting expensive but not rare
rob t

[Yorkie]

These sets use battery valves with 1.4V heaters in series, which explains the 7.5V LT battery. Hence, one valve with an open circuit heater, or poor pin contact in the valve-holder will stop the set working. I haven't go the circuit to hand just now, but I assume that the mains input has a voltage selector. Given the fragility of the filaments in these valves, it's important to ensure that the heaters aren't over-run with too high a voltage when working on the mains. If the filaments are intact, it's unlikely that the valves will otherwise be faulty (ie, low emission). I'd be inclined to check out the 'switchery', HT voltages and aerial circuitry. If the audio stage is working, scratching the wiper of the volume control should cause loud crackles from the speaker.

Best of luck with the set Kevin, when you get a 'round tuit'!


David

David

[tiv48]

sorry to disagree with yorkie but i have found that if v1 (dk92) is low emission then it wont oscilate
also if c20 (0.01mf)the audio coupling cap is leaky then v4 (dl94) will have suffered
please note that the heaters are fed via ballast resistors from the ht line when connected to the mains
info from trader 1155
rob t