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PJL · 14th May 2023, 9:58 am

My original valve version needs careful tuning as the RF gain is only good when close to oscillation, it also distorts quite badly. I have not checked the valves so maybe one of them is the cause. The wavechange switching is also odd as the aerial coil has 2 positions but the anode coil has 3 so the mid-position does not always require the aerial tuning capacitor to be reset to the beginning.

The original E415 (154V in UK version) are indirectly heated. Maybe yours had been modified to use a 2V directly heated valve?

14th May 2023, 9:58 am	#24
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Philips 2514 My original valve version needs careful tuning as the RF gain is only good when close to oscillation, it also distorts quite badly. I have not checked the valves so maybe one of them is the cause. The wavechange switching is also odd as the aerial coil has 2 positions but the anode coil has 3 so the mid-position does not always require the aerial tuning capacitor to be reset to the beginning. The original E415 (154V in UK version) are indirectly heated. Maybe yours had been modified to use a 2V directly heated valve? Last edited by PJL; 14th May 2023 at 10:10 am.