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Locked Re: Wellbrook ALA1530


 

Dear Nigel

forgot that getting old, I remember that now, I remember seeing the pictures but was fuzzy on whether for sure bipolars were used

I believe it was not known from the autopsy whether it was a Norton design or not

otherwise it is likely a push pull grounded base design for low noise and wide bandwidth

what do you think?

was there a schematic ever published for the Wellbrook

best
Paul

----- Original Message ----
From: "gandalfg8@..." <gandalfg8@...>
To: loopantennas@...
Sent: Saturday, May 5, 2007 12:36:40 PM
Subject: Re: [loopantennas] Wellbrook ALA1530















In a message dated 05/05/2007 17:28:55 GMT Daylight Time,

nonlinear@rogers. com writes:



highest gain and lowest noise more likely with jfets



ie more likely in the design than bipolar although not necessarily true if

one considers say the David Norton noiseless design with bipolar



however the Norton design is limited to smaller gains



------------ --------- --------- --------- --------- ---------

"Is more likely" is a bit different to the earlier "must have".



I was just intrigued as to your reasoning, considering that the hardware

content of a dismembered 1530 was discussed here in some detail only a few weeks

ago and the active devices were obviously bipolar.



regards



Nigel

GM8PZR


















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