[etech]

Hi all,

I have been working on my old Hickok 600A and it is working fairly well. All the voltage tests are within specs and I have pulled and cleaned the english pot and recalibrated it. I have also run the mutual conductance check and it seems within spec on the 3000 micromho range. All seems well.

Next, I would like to verify the calibration on the 6000 micrmho range. So, does anyone have a 6L6 calibration tube that I might be able borrow? If you would be so kind, I would pay first class mail shipping both ways.

Not only would I like to verify the calibration on my newly tuned up 600A, but  I also have five 6L6 metal tubes that I purchased years ago for a buck a piece. The gm readings I am getting on these tubes range from 4800 to 6300 micromhos. Once my 600A is accurately calibrated with the test tube, I will test all of these metal 6L6's and put aside and mark one of them that measures close to the test tube for use as my own test tube.

I would appreciate any help.

Thanks,

Ed