My Argosy II 525-D is serial 52501892 The front panel has the "Argosy II"
label.
On the RF Mixer Board, U2 is physically a very small black 4-legged round
device with the following label: 87clk32 I cannot determine if the l is
actually a numeral one, the letter L or the letter I)
My schematic specifies U2 as an ND487CI (or CL or C1).
73, Mike N4NT
----- Original Message -----
From: "Kevin Purcell" <kevinpurcell@pobox.com>
To: <wa3fiy@radioadv.com>
Cc: "Kevin Purcell" <kevinpurcell@pobox.com>; "Discussion of Ten-Tec
Equipment" <tentec@contesting.com>
Sent: Wednesday, September 26, 2007 6:04 PM
Subject: [TenTec] Argosy 525/525D mixers and serial numbers revisited
Thanks for your replies.
I'm writing another reply but I realized that you help fill in more
of the serial numbers on my list. See my old post
<http://lists.contesting.com/archives//html/TenTec/2007-05/
msg00036.html>
So the list of mixers versus serial numbers in now includes yours.
525 00721 1496 VE7BGP
525 ????? PN ring KW7CD
525 01188 mixer? WA3FIY
525D 01611 ND487C1 N7WIM (with Argosy front panel)
525D 01810 ND487C1? WA3FIY
525D 02497 ND487C1 N7WIM (with Argosy II front panel)
But we're missing the mixer type in your 525. It would (help) confirm
the theory that the 1496 was dropped after S/N 00823 and that the
later 525 used a PN diode ring as mentioned in Dretea's article in
Ham Radio on Argosymods.
|