On Saturday 28 October 2006 04:46, Bill Harms wrote: > Fine tuning pots could be one solution I suppose. I have never > tried them. On my Quantum phaser, I retro-fitted two 6-to-1 Vernier > Reduction Drives. I also installed one on my K9AY indoor control > unit. This gives me fine control. The biggest issue is that you have > to engineer a way to mount them. I might write a mini-article to > describe how I did it if there is enough interest.
It's a matter of taste, I guess, but I like the fine tuning pot approach. I recently found a 10-turn "Helipot" in the junk box, so I added it to my MFJ-1026 as a fine phasing adjustment (in place of the unneeded "T/R Delay" pot). The old phasing pot is still there, so it can be used as a coarse adjustment to rapidly find the vicinity of the null, and then the fine tuning pot is used to tweak it. I decided that the gain pots didn't need fine tuning, but I replaced the originals with higher quality units, and installed larger knobs. Barry -- Barry McLarnon VE3JF Ottawa, ON _______________________________________________ IRCA mailing list IRCA@hard-core-dx.com http://arizona.hard-core-dx.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
