[Test-Equipment] HP-606A Calibration question

[Barry]

> Barry, in that case you have no choice but to reset the dial. As long as 
> it is apart look for the orignal set screw marks.
>
> On the BCB range that you indicated earlier the linearity can be well 
> under spec. If necessary very carefully move plates for the worse case 
> band.
>
> On the ham bands or general coverage receivers the 606A built in 
> calibrator works great. The first time I used a 606A was at National Radio 
> when the GR-1000A's were replaced.
>
> I use a 606A and 8640B here, the 606 has better phase noise performance 
> and its a lot more convenient for general coverage receiver alignment.
>
> Most 606 problems are 12B4's with leakage, other weak tubes and a small 
> electrolytic or so, usually in the modulator.
>
> Carl

I sold my GR-1001A a couple of years ago.  Kind of wish I hadn't...

As fas as finding the original set screw marks, this was a case where the 
round clamp (the one with the 4 x #6-32 flat-head screws) sandwich the dial 
plate to the hub so there are no marks to align with.

Thanks for the help.  I need to check the tubes, but it seems to work pretty 
well so far so haven't gotten into any real trouble-shooting.

Barry - N4BUQ