I was confused, again. Should have said 850. The 851 is the little 500
watt unit.
R.C. Morris wrote:
> Maybe someone moved the taps.
> One of Bill Orr's handbooks talks about moving the taps on the 851.
> Forget if also the 852. Whatever you end up for Pz, one of the taps may
> be OK, but they don't follow for the other bands.
>
> I have a pair of 3-500's at 3800 volts with an 851. After 20 years, I
> forget what band was good, but moved at least three others and replaced
> the 10 meter coil.
>
> Figure your plate Z, check the charts, and I think you will need a big
> solder tool.
>
> Bob Maser wrote:
>> The B&W 852 that I bought arrived today and is in good condition. I took
>> some inductance measurements for each of the band positions and found that
>> all of them are low as compared to what I thought they should be.
>>
>> Original Specs Actual measurement
>>
>> 10 .95 uH .61 uH
>> 15 1.34 .96
>> 20 2.34 1.67
>> 40 3.72 2.56
>> 80 7.00 5.41
>>
>> My measurements were made on a AADE unit which has always been very
>> accurate. The 852 was not mounted on the aluminum chassis, just sitting on
>> a wooden bench. I cannot see any signs of alteration, it all looks stock.
>> In order to use this 852, the Q would be between 15 and 20, very sharp
>> tuning. The Original specs correspond to a PLI of 2000 with a Q of ±12.
>>
>> Any comments would be appreciated.
>>
>> Bob Maser W6TR
>>
>> _______________________________________________
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>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
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