Author Topic: FS: [AU-VIC] Rohde & Schwarz SMFS2 Comms Tester  (Read 54 times)

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Online gab_au

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  • Country: au
FS: [AU-VIC] Rohde & Schwarz SMFS2 Comms Tester
« on: Today at 05:06:06 am »
Hi all,
I have for sale a Rohde & Schwarz SMFS2 comms tester.

The tester is in working order, and has had the following repairs.
1) The power button and lever was missing when I bought the tester. I have replaced them with a homebrew button and lever.

2) The power supplies of these are notorious for burning out the BJTs. I have modified the DC-DC converter to use mosfets. Info on the mod is supplied and could be reversed if you wanted too.

3) The 3 phase fan and controller board was faulty and has been replaced with a 12V computer fan.

4) The original attenuator protection relay (removes power from the attenuator assy) often got stuck in the off position, even the chinese "new" replacement. I have replaced it with a drop in board with a more reliable panasonic relay.

A significant number of electro caps have been replaced as well as other repairs to make this a reliable instrument.

It has oven reference, but in R&S wisdom it does not keep the oven on when the instrument is off, so it takes a good 15 mins to stabilize when 1st turned on.

Pickup preferred from 3093, but will ship by e-go.com.au (hunters) at buyers expense. Go to their webpage and use the following dimensions to get an estimate. 57 x 59 x 30 cm, 27kg.

$1100 + courier cost.
 


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