I have a Dentron MT-3000A-clone MFJ-984 tuner. I'd like to improve performance on 80 & 160M QRO and read of one Ham changing the C1 240pf input series cap to 750pf and C2 114pf to 675pf. While I expe
Why not add some 250 or 500pF doorknob caps that can be switched in in parallel with the current capacitors? The actual switches will take some care, but maybe some vacuum relays could be used for a
Hey! I was going to suggest that. Actually it's a good way to increase the range without giving up the resolution of the smaller tuning cap. There are a number of amps that take that approach with th
As an added note, the Henry HF amps use a series of plastic cams on a shaft geared to the band switch. There is a 2KD classic on e-bay that has several photos that show the cams. Today is 18th and i
Great helpful ideas! I checked out the ebay posting and saved the relevant pics for future reference. Will have to dig into the tuner to see where best to locate the switched caps. Thanks! -- Thanks!
If you find you need more detail I have both a 2K4 and a Halllicrafters HT-33B and could shoot some close ups of those switches. It'd just take me some time to get them posted on my site. Roger Halst