FOR SALE:
1) Hewlett Packard Model: 425A VTVM
Specs: Vacuum Tube DC Micro Volt Ammeter
DC Voltage Ranges: Eleven zero-center ranges in a 1-3-10 sequence with following full scale
positive and negative values:
±10, 30, 100, 300 microvolts;
±1, 3, 10, 30 millivolts;
±0.1, 0.3, 1 volt.
Input impedance on Voltage Ranges: 1 meg ohm ±2%; determined by input resistor which
can be removed to provide input Z in excess of 50 megohms.
DC Current Ranges: Eighteen zero-center ranges in a 1-3-10 sequence with following full
scale positive and negative values.
Has no accessories, untested - sold as-is, but appears to be in good condition.
Requires 115V AC
Available for $35.00 plus shipping.
2) Hewlett Packard 415B SWR Meter. Untested - looks good. I have no specs, but looks like
a cool gadget. Available for $30.00 plus shipping.
73 de AF4K, Bry
Posted by: "Bry Carling AF4K" <bcarling@cfl.rr.com>
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