UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Dynatron Jewel TP30

Tully Bascombe · 21st May 2019, 10:06 am

Some progress on the Jewel. I've pulled all the electrolytics from the PCB and tested their state of health.

Here are the results according to the LCR-T4 component tester:
CCL 350uF 9V(?) - open, dead
CCL 2uF 50V - 6.9uF ESR 9 ohms, Vloss 11%
CCL 8uF 50V - 9.3uF ESR 0.14K ohms, Vloss 20%
CCL 8uF 50V - 14uF ESR 1.8 ohms, Vloss 2.3 %
Plessey 100uF 6V - open, dead
Plessey 100uF 12V - 113uF ESR 7.2 ohms, Vloss 5%

Dynatron did not make this servicing job easy as all the component leads have been bent over on the copper track.

Next job is replacing all 6 caps and hopefully the low audio output will be fixed.

21st May 2019, 10:06 am	#4
Tully Bascombe Triode Join Date: Mar 2019 Location: Chesterfield, Derbyshire, UK. Posts: 24	Re: Dynatron Jewel TP30 - first attempt at repair/restoration Some progress on the Jewel. I've pulled all the electrolytics from the PCB and tested their state of health. Here are the results according to the LCR-T4 component tester: CCL 350uF 9V(?) - open, dead CCL 2uF 50V - 6.9uF ESR 9 ohms, Vloss 11% CCL 8uF 50V - 9.3uF ESR 0.14K ohms, Vloss 20% CCL 8uF 50V - 14uF ESR 1.8 ohms, Vloss 2.3 % Plessey 100uF 6V - open, dead Plessey 100uF 12V - 113uF ESR 7.2 ohms, Vloss 5% Dynatron did not make this servicing job easy as all the component leads have been bent over on the copper track. Next job is replacing all 6 caps and hopefully the low audio output will be fixed. Attached Thumbnails