Hi,

Wonder if anyone can help.

Q1. Fresh off of eBay, this SA is having terrible problems with input RF
leaking straight through to the IF on the lowest RF range. I assume
that the input mixer is shot (441-0671-03).

If I remove the LO feed to this mixer, the expected signal goes away,
but the crud remains. I assume that the IF on the lowest RF range is
close to one of the broadcast bands (TV or FM).

The mixer assy has two diodes which look like they should be easy to
replace. Does anyone have a schematic for this assy or maybe just tell
me what these devices are and some idea where I might get
replacements.

Q2. I feed in 144 Mhz and crank the SA centre frequency lower (130MHz) and
the trace shifts left (I rather expected it to shift right). I assume
that this could be connected with the busted mixer ?

Q3. This one is definatly operator error. The mid range 'B' has two scales
270 - 900 and 800 - 2000MHz. How do I switch between these two ranges
(!)

Thanks in advance.

Mark.