Hacker Mayflower II (RV20) - UK Vintage Radio Repair and Restoration Discussion Forum

flyingtech55 · 7th Jun 2020, 4:10 pm

A chap on another forum mentioned that he had substituted an ECC88 for the ECC85 in the VHF tuner head of his Hacker Mayflower as it was a superior valve. Can you do that without having to re-align the tuner head. The ECC88 is a frame grid valve so will presumably have different inter-electrode capacitances.

TimR

flyingtech55 · 12th Jul 2020, 2:33 pm

The answer to this one is......yes. I was speaking to Richard of Past Times Radio and he confirmed that I could just substitute the new valve and it would work fine but with slightly better sensitivity. That's exactly what happened.

Tim(R)

7th Jun 2020, 4:10 pm	#1
flyingtech55 Octode Join Date: Nov 2005 Location: Ayrshire, UK. Posts: 1,096	Hacker Mayflower II (RV20) A chap on another forum mentioned that he had substituted an ECC88 for the ECC85 in the VHF tuner head of his Hacker Mayflower as it was a superior valve. Can you do that without having to re-align the tuner head. The ECC88 is a frame grid valve so will presumably have different inter-electrode capacitances. TimR __________________ All those moments will be lost in time, like tears in rain.

12th Jul 2020, 2:33 pm	#2
flyingtech55 Octode Join Date: Nov 2005 Location: Ayrshire, UK. Posts: 1,096	Re: Hacker Mayflower II (RV20) The answer to this one is......yes. I was speaking to Richard of Past Times Radio and he confirmed that I could just substitute the new valve and it would work fine but with slightly better sensitivity. That's exactly what happened. Tim(R) __________________ All those moments will be lost in time, like tears in rain.