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theredhouseinn · 1st Dec 2019, 6:51 pm

The 8-128 var cap is used on the bands 4, 5, & 6'
I have hard wired the coil direct to the anode and grid of the osc valve, leaving out the var cap and the switch, using fixed caps to tune the osc. Still have the fault.
All that I can see is left is the coil former material.
Today I heated up the osc compartment with the anglepoise lamp and chased the osc with the tuning control and from cold to quite hot I chased the osc from 30.5meg down to 29.5 meg on the scale. Something is very tempreature concious, but I don't have another one to compare.
Next step is to buy another one for spares.
Keep the theories coming, I will not give up!!

1st Dec 2019, 6:51 pm	#42
theredhouseinn Hexode Join Date: Jan 2013 Location: Kelvedon, Essex, UK. Posts: 273	Re: RCA AR88D Comms Receiver. The 8-128 var cap is used on the bands 4, 5, & 6' I have hard wired the coil direct to the anode and grid of the osc valve, leaving out the var cap and the switch, using fixed caps to tune the osc. Still have the fault. All that I can see is left is the coil former material. Today I heated up the osc compartment with the anglepoise lamp and chased the osc with the tuning control and from cold to quite hot I chased the osc from 30.5meg down to 29.5 meg on the scale. Something is very tempreature concious, but I don't have another one to compare. Next step is to buy another one for spares. Keep the theories coming, I will not give up!!