They are slightly different for the two amps. However, I have bought replacements that are either direct replacements or ones that need slight modification from Surplus Sales of Nebraska, sometimes Nationwide Radio has them, the Crystal Set Society, and sometimes on Upay, I mean Ebay.
73, Evan, K9SQG -----Original Message----- From: Dennis Monticelli <[email protected]> To: K9sqg <[email protected]> Cc: [email protected]; [email protected] Sent: Thu, Jan 13, 2011 11:07 pm Subject: Re: [Drakelist] L-4B Plate Tuning Cap Question Is there a new replacement drive for the L4B and L7 verniers that can be purchased? Dennis AE6C On Thu, Jan 13, 2011 at 2:05 PM, K9sqg <[email protected]> wrote: Dino, This is normal operation for a vernier drive that has either sat for an extended period of time unused or, in less frequent cases, one that has had a lot of use. There are ways of cleaning, relubing, and then repositioning things so the drive has "renewed bite" so to speak. However, for all it takes to do this in terms of time and effort, one can consider just replacing the drive itself. It is a matter of personal preference. Good luck with your decision. 73, Evan -----Original Message----- From: Dino Papas <[email protected]> To: Mail List - Drake Gear Drake Gear <[email protected]> Sent: Thu, Jan 13, 2011 3:59 pm Subject: [Drakelist] L-4B Plate Tuning Cap Question Well, today in anticipation of rebuilding my L-4BPS I decided to finally install the Harbach soft-start module in the amp (hey, its only been sitting in the project queue for a few years....no sense in rushing). While I had it open did the normal maintenance stuff, lubed the fan etc. I've had a problem now for a couple of months with the plate tuning cap turning action. Somewhere between the 80m and 40m sections the turning action slows down to a standstill and you'd have to spin the knob several times to get it to move VERY slowly thru its rotation. With the amp opened up I found that a little bit of pressure applied either as a push or pull would get the cap to rotate at almost normal speed throughout its rotation. Not wanting to screw something up I decided to leave it alone and check with the group. It may just be that after 32 years the rotation mechanism is just wearing out. Anyone else experience this? If so any fixes? Thanks in advance! Dino KL0S BTW, the Harbach module works great....the power supply board is built and ready to install but think I've done enough for today! _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist =
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