UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - The Ever-Ready experimental transistor TV set.

FERNSEH · 4th Jul 2020, 5:51 pm

Hi Keith,
it's a pity this set or something like didn't go into full production, the low power consumption would have been a sure selling point. Possibly the cost of making this kind of set?
Still got one fault to sort out. The picture rolls on switch-on, this can be easily corrected with the frame hold control but after a few minutes frame sync is lost and the set remains in that condition for up to three minutes. Then the timebase oscillator assumes a lower frequency necessitating readjustment of the hold control again. After resetting the hold control the set will remain stable for as long as one would want the set to remain in use.
Suspect components were the oscillator transistor and the two 1microfard timing capacitors, now replaced.
I'm thinking about those Lucas diodes in the frame oscillator

DFWB.

4th Jul 2020, 5:51 pm	#70
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: The Ever-Ready experimental transistor TV set. Hi Keith, it's a pity this set or something like didn't go into full production, the low power consumption would have been a sure selling point. Possibly the cost of making this kind of set? Still got one fault to sort out. The picture rolls on switch-on, this can be easily corrected with the frame hold control but after a few minutes frame sync is lost and the set remains in that condition for up to three minutes. Then the timebase oscillator assumes a lower frequency necessitating readjustment of the hold control again. After resetting the hold control the set will remain stable for as long as one would want the set to remain in use. Suspect components were the oscillator transistor and the two 1microfard timing capacitors, now replaced. I'm thinking about those Lucas diodes in the frame oscillator DFWB.