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Old 14th Nov 2017, 11:23 am   #9
newlite4
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Join Date: Nov 2003
Location: Bath, Somerset, UK.
Posts: 1,801
Default Re: BEME Mini Loop - silent

Just about got this going last night, faults centered around the DK91 as expected. It turned out to be a bad valve socket although there is lots more clearing up to do. I had a good 0.75Vpp signal on grid 3 (RF in) at around 5MHz, the local oscillator grids 2&4 sprang to life to give 13.5Vpp at around 4MHz and after a little movement in the socket, the 82VDC on the anode became modulated with the IF signal. I would think that all valve bases need a check over (this set would have been at sea after all) and a re-cap may not go amiss as it uses the brown mouldseal caps.
Getting there,
Neil
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