Well, the very nice M3700 went yonks ago when we closed down our audio post facilities but the new owner didn't need the power supply so here is a very nice orphaned Tascam PS-3700 power supply (which will also be fine with the M3500)
I have had this power supply sitting in our storage units so today I took it out and made some tests, all is looking fine - see my detailed comments and observations below ...
TASCAM M3700/M3500 Power Supply (ONLY)
Model: PS-3700
Made In Japan
240V Australian version (standard IEC male socket)
Rack mounting
RU Standard 19" rack
NO cable between this power supply and the mixer is supplied (often called the umbilical cord!) I expect the new owner would already have this already (large rectangular 28 way Hirose male connector at the power supply end of the cable)
Power Supply weight: 20Kg
Heavy!!! Extensive use of steel in the casing and the AC step-down transformer is a monster! Bend the knees lifting this beastie! This gear is reminiscent of those Studer B67's - dog of a thing to carry round!
CONDITION:
Excellent and clean
This power supply has never been dropped (watch those feet!)
The only mechanical component is the ON-OFF switch - all fine here
TESTING:
As this power supply has been sitting in the corner of the storage, (feeling neglected and alone) I gave it a good checking over before creating this advertisement.
My background is technical so here is some techie stuff for you ...
This is a completely linear power supply, no SMPS here!
Well laid out and easy to work on (if ever required) the main board is organised with multiple fuses on the secondard AC inputs from the transformer. These AC lines are taken to the back panel to the bridge rectifier blocks. The resulting raw DC comes back to the main board and is filtered by the "farm" of electro's all huddled together. The rest of the power supply board looks after the maintaining correct DC voltages and the large high current transistors are connected to this board via flying leads, one set for each transistor. All interconnections are made with molex style plugs and sockets so this makes servicing quite a bit easier (no desoldering from the board is required)
A schematic of the power supply was found online and this helped confirm the various voltages I measured - screenshot of this schematic is included in the photographs
Power switch (non-illuminated) with that distinctive "dirty brown" Tascam colouring works fine. Noticed that there is barely any transformer "buzz" at switch on - nice, especially considering the size of this one. I expected a significant "rush current" but it turns on very quietly - it is a truly massive transformer at 150mm wide x 170mm deep x 120mm high
Transformer is part # 5320060300
Other components of note:
Mounted on the back wall of the case are 1x 2SC3281, 2x 2SA1302, 1x 2SC3181 power transistors and a small (by comparison) JRC 7808 regulator
The finned heatsink on the rear of the case is massive, taking almost the whole width of the case
Very nice Nippon electro's 4x 22000uF 35V & 2x 18000uF 35V
There are no visible signs of capacitor/resistor stress and certainly no bulging!
MEASURED VOLTAGES:
At the connectors P003, P004 & POO5
POO3 - 36.7V AC & 48.3V DC (back from the bridge)
POO4 - 16.7V AC & 21.3V DC (back from the bridge)
P005 - 9.56V AC & 11.57V DC (back from the bridge)
These voltages are all fine
Checked the main output connector P012
I have +15, -15, +12, +8 & +48V DC
These voltages are also fine
I am 100% confident that the power supply is just as ready to "get down to business" as it was around 15 years ago!!!
My website only has an API for Australia Post, this equipment is right on the borderline of their acceptance (due to the weight) and it MAY be more economical to use a courier - ask me for courier pricing and I can get a quote for you.
EXAMPLE:
I just made a "test" Australia Post quote for shipping to postcode 3000 (Melbourne metro)
The quote is $42
I made the same quote request from Couriers Please
The quote is $23
Obviously (IN THIS CASE) Courier is the way to go. This is not always the case, particularly if it is being sent to a regional area or far flung places such as Perth or Darwin! In such cases, usually Australia Post is better (but still not 'cheap')
