UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Regentone 17 -18 thermistor

regentone001 · 11th Jun 2016, 7:06 am

Hi guys. Well the new thermistor arrived and I have finally got around to fitting it. Whilst I had the set apart I also tidied up the components I had tacked in when tracing the frame collapse, so a new R64 820k, C57 0.05uf, R41 33k, were fitted. I also fitted a new R27 27k and R31 10k which had gone high. I also found that I had fitted the replacement for MR5 in the AGC circuit the wrong way around, which explained the lack of difference the Contrast control made. Now the set is far more stable, touch wood, I used it for 3 hours last night and no frame jitter. There is a lot more contrast, it was OK before but now its great. The frame is really linear and stays that way.
(All component numbers used are from the manufacturers manual)
Thanks for all the advice and help.
Steve

11th Jun 2016, 7:06 am	#5
regentone001 Heptode Join Date: Sep 2014 Location: Coventry, West Midlands, UK. Posts: 519	Re: Regentone 17 -18 thermistor Hi guys. Well the new thermistor arrived and I have finally got around to fitting it. Whilst I had the set apart I also tidied up the components I had tacked in when tracing the frame collapse, so a new R64 820k, C57 0.05uf, R41 33k, were fitted. I also fitted a new R27 27k and R31 10k which had gone high. I also found that I had fitted the replacement for MR5 in the AGC circuit the wrong way around, which explained the lack of difference the Contrast control made. Now the set is far more stable, touch wood, I used it for 3 hours last night and no frame jitter. There is a lot more contrast, it was OK before but now its great. The frame is really linear and stays that way. (All component numbers used are from the manufacturers manual) Thanks for all the advice and help. Steve