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

0 Members and 1 Guest are viewing this topic.

Online gab_au

  • Contributor
  • Posts: 13
  • 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 (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.

Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo