[R-390] FW: the saga cont. pt 9

[William A Kulze]

Has anybody tried a balun of the proper ratio to couple the coax to the balanced input?

Bill W2NVD

(Sorry, forgot to change 'reply to' to list on first send)

-----Original Message-----
From: Craig C Heaton [mailto:wd8kdg at att.net] 
Sent: Monday, September 20, 2010 4:41 PM
To: ka9egw at britewerkz.com; William A Kulze; R-390 at mailman.qth.net
Subject: RE: [R-390] the saga cont. pt 9

Brian,

Using the same method here, a couple of pins soldered to 50 ohm coax to the
balanced input, per Rippel's website. One side is grounded to the frame and
his method is working well. Both of the outputs of my sig-gens are 50 ohm
and I peak n' tweak the RF cans as a 50 ohm input RX. Don't have the manual
in front of me at this time, but there is an advantage using the balanced
input and not crossing the jumpers between the balanced and unbalanced
terminals.

Craig,

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of ka9egw at britewerkz.com
Sent: Monday, September 20, 2010 12:59 PM
To: William A Kulze; 
Subject: Re: [R-390] the saga cont. pt 9

My understanding is the two 68ohm resistors thing, is to put a signal in as
common-mode for adjustment of one trimmer per band, the balancing caps
nearest the front panel, only.

I'm using a couple pins to feed my balanced inout, but it only works when
reversed from the pin-out Chuck Rippel recommends, and it's that way on all
bands.  And no, P206 and P207 are not reversed.  Odd.  Very odd indeed.  And
it's that way with 2 different rf decks.

73, Brian KA9EGW