John,
In response to " What does the buffer amplifier do?" The ad for the Buffer
Amplifier says: The Z10000B was developed to obtain an isolated signal
sample from the IF of a transceiver or receiver to output to a spectrum
analyzer or panadapter. I have run the O II with and without the buffer
amplifier and the O II works both ways, however I did have some problems
when I was operating the O II without the Buffer amplifier and never had any
problems when I did use the buffer amplifier. So I always use it now.
Note that this is when used with a O II that was modified by TT Service
Dept. to extract a 9 MHz IF signal (no buffer/isolator installed inside the
O II). I have not installed the RX-366 Sub-RX yet, but at $639 that will
happen soon.
Sorry it has been a year or two since I did that mod & set up the
panadapter and I do not recall now exactly what the problems were at that
time - I think they were related to overflow issues. I paid about $25 for
the buffer amplifier, assembled, tested, and installed in a box.
I am not sure if the RX366's 9 MHz IF output is buffered and reverse
isolated or not; perhaps John Henry can answer that. If the RX-366's 9 MHz
IF output is buffered and reverse isolated than you probably do not need an
additional buffer/reverse isolator.
Stephen AD7TD
-----Original Message-----
From: John Molenda
On 1/30/2012 4:28 PM, Stephen Cannon wrote:
> John,
> Personally, I would wait for the RX366 (since it is due out any day
> now) and use it (since it does output a 9 MHz IF) in lieu of modifying the
board.
> This way you get a better Sub-RX as well as the 9 MHz IF output, and
> you can easily do this mod yourself by a simple easily accessible
> board replacement (might be cheaper than shipping& insuring the O II
> to TT and back, and paying TT to do the mod). You may need an
> additional RG-178 miniature cable with Taiko Denki TMP plugs on both
> ends, (which TT sells for about $12), to connect the new Sub-RX
> board's 9 MHz IF output to the empty Taiko Denki jack on the I/O board
(and thus have the 9 MHz IF output coming out the "SPARE"
> jack on the back of the O II). You will still need to get the
> Z10000B-U buffer amplifier from Clifton Labs (with 0 dB gain) to
> connect between the back of the O II and the panadapter.
>
> That said I am sure you can still get TT to do the mod for you.
>
> Stephen AD7TD
>
> -----Original Message-----
> From: John Molenda
>
>
>> Hi-
>> VE7TK has offered a mod to add a Clifton Z10000(b) buffer
>> amplifier to extract a 9 MHz signal for use with the Elecraft P3.
>> Has anyone had experience with this mod or later use with the P3?
>>
>> 73 de Dave, K1OPQ
> _______________________________________________
What does the buffer amplifier do ? John kb2huk
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