09-12-2016, 09:20 PM
Hi.
I've been testing out a three valve version over the last few days. AF Pre stage, Modulator & RF buffer, also a two valve version with audio pre stage and modulator. I have incorporated NFB in the three valve version and the results are outstanding.
I intend to upload three separate diagrams for one, two and three valve versions. Next week I will do another couple of You-tube videos of the Two & Three valve versions.
The single valve version ran for 24 hours with no change of voltage from the PP3, the three valve version only draws around 1ma from the PP3, a fully charged Ni-Mh 2400 ma/hr AA battery should last 200+ hours on the single version or 70 hours + on the three valve version. A higher capacity C or D cell would give longer time between charges.
Watch this space.
I've been testing out a three valve version over the last few days. AF Pre stage, Modulator & RF buffer, also a two valve version with audio pre stage and modulator. I have incorporated NFB in the three valve version and the results are outstanding.
I intend to upload three separate diagrams for one, two and three valve versions. Next week I will do another couple of You-tube videos of the Two & Three valve versions.
The single valve version ran for 24 hours with no change of voltage from the PP3, the three valve version only draws around 1ma from the PP3, a fully charged Ni-Mh 2400 ma/hr AA battery should last 200+ hours on the single version or 70 hours + on the three valve version. A higher capacity C or D cell would give longer time between charges.
Watch this space.
