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Keith · 8th Jun 2017, 10:34 pm

Another possiblity would be a reduction in the effective cathode resistance for that valve. You mentioned that R807 had gone o/c. Was it replaced with the correct value? Or maybe the parallel capacitor is low resistance? You also say that P605 no longer controls the Ik for the valve. I can't quite read the circuit in that area but it must be a clue.

8th Jun 2017, 10:34 pm	#39
Keith Heptode Join Date: Jan 2003 Location: Tewkesbury, Gloucestershire, UK. Posts: 693	Re: Sailor T128 Marine Transmitter. Another possiblity would be a reduction in the effective cathode resistance for that valve. You mentioned that R807 had gone o/c. Was it replaced with the correct value? Or maybe the parallel capacitor is low resistance? You also say that P605 no longer controls the Ik for the valve. I can't quite read the circuit in that area but it must be a clue. __________________ Keith Yates - G3XGW VMARS & BVWS member http://www.tibblestone.com/oldradios/Old_Radios.htm Last edited by Keith; 8th Jun 2017 at 10:40 pm. Reason: Further relection...