R L Measures wrote:
>
> On Aug 1, 2006, at 8:52 AM, Steve Thompson wrote:
>
>>
>>
>> R L Measures wrote:
>>
>>>
>>> On Jul 31, 2006, at 10:41 AM, Steve Thompson wrote:
>>>
>>>>
>>>>
>>>> R L Measures wrote:
>>>>
>>>>>
>>>>> On Jul 31, 2006, at 1:26 AM, Steve Thompson wrote:
>>>>>
>>>>>> Please ignore my previous post - just realised I misinterpreted
>>>>>> Rich's
>>>>>> reply.
>>>>>>
>>>>>> I still don't believe in glass that's ok at 30MHz but duff at
>>>>>> 100odd
>>>>>> though.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> D-factor doesn't normally increase with increasing freq?
>>>
>>>
>>>
>>>> It's not whether it increases but by how much as a percentage and to
>>>> what value in absolute terms.
>>>
>>>
>>>
>>> The problem here is that the glass apparently melted from dielectric
>>> heating, not from IR emitted by the anode. .
>
>
>> OK - I'll speculate it's a manufacturing flaw in the envelope, you
>> speculate that it's a parasitic oscillation working on some magic glass,
>> and we'll agree to differ.
>
>
> Lead fluxed glass is not magic, it's the most common type, Steve.
Unless I've been labouring under a misapprehension, the melting was
attributed to a vhf parasitic rather than normal hf operation. I reckon
that glass which changes its loss so much between those frequencies is
so special as to be magic.
Steve
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|