Jim -

I have that exact Alpha amplifier in my radio shack (one of my Elmers was original owner in late 1970s).
I recently refurbished (new electrolytic capcitors, etc.)
You indicated that you have the Hypersil or regular HV transformer?

There are a couple of resistors that you need to check on the PC board (bias supply).  

The realy you are talkign about sound slike the contactor, I am at client site today -- but can check my notes over next couple of days.

Alpha Power does still service thie model (and provide phone assitance for your troubleshooting) -- and whne I was there 18 months ago -- I did pickup a couple of parts.

w9gb

Well, the HF-1250 appears to be an orphan.
The last request for assistance by other owners -- neither Commeander or QRO seem to have documentaiton or support.

w9gb

IF you lost the processor -- then it may be uphill raod. Yaesu can not even reprogram a chip (built in 2K EPROM) if you found one!

CPU MUSEUM
http://www.cpu-museum.com/14805_e.htm

CPU MUSEUM - chip was made in 1978

http://www.cpu-museum.com/14805_e.htm

Motorola MC146805G2P

It's a 6805 microcontroller with 2 KB masked ROM. Because of that masked ROM it'd be very difficult to replace it - you will need either to find MC146805G2P with exactly the same ROM mask, or, if ROMless or development version of MC146805G2P exists, get ROM contents somehow, and replace MC146805G2P with development/ROMless chip + EPROM.

Yaesu USA claims they can not even program the chip -- IF you did find one (Fox Tango Int'l)

FYI, read this message from C.L. Maher (Fix Tango Int'l) --- 3 years ago.
http://lists.contesting.com/_yaesu/2004-05/msg00016.html

The CPU is NO LONGER AVAILABLE --- ANYWHERE.
When I turned the main dial the rig would jump all over the place and the CPU was totally confused.  
I bought a junker 757Gx locally that had a good CPU, installed it in my rig, replaced the 5v regulator and repaired the trace and things started coming back to life.  Just as a note to anyone with a 757, if you have a failure of the 757 CPU, don't waste your time talking Yaesu for the part.  
THEY DON'T HAVE IT ANYMORE.  They told me even if they did have the chip, they had no way to program it.  So be very carfeul when working in your 757 when it's on.

"Soldered in" lithium coin cells are not uncommon for mobile or handheld equipment.  
These designers were concerned that traditional coin cells may 'fall out' or be dislodged from a coin cell holder.
Replacements available from Yaesu or battery suppliers (Sanyo or Panasonic)

gb

At least you are learning about thermal deisgn (heat sink area, cooling required, etc.).
I really get upset with many of the thermal designs from presumedly qualified engineering grads.  Actual construction and application is sometimes a better teacher than the formulas alone.

gb

A ComSpec CTCSS (PL) encoder/decoder -- like the TS-64
http://www.com-spec.com/ts64.htm

OR an encoder only, like the SS-64 -- will work well.
http://www.com-spec.com/ss64.htm

Icom IC-211 Installation instructions for these CTCSS encoders:
http://www.com-spec.com/insheet/ic211.pdf

w9gb

KEEP that "Golden screwdriver" in your pocket!
That is a sure sign of Homer Simpson.

With a rated dummy load and a good wattmeter (Bird 43 w/peak reading) -- you can make appropriate measurements.

Join the Yahoo TS-440S Users Group.

w9gb
.. and TS-440SAT owner (saved from the dumpster)

As you mentioned, the TS-2000 is a transceiver with largely surface mount components.  What is your bench experience with surface mount electronics?  

w9gb

You can start with the Swan 700CX manuals and schematics

BAMA
http://bama.sbc.edu/swan.htm

6-meter group:
http://6mt.com/swtv2.zip
http://6mt.com/sw700cx.zip

You may wish to e-mail KD6ZR for some photogrpahs of his 700CX for your restroation assistance!
http://www.accessatc.net/~rjlutz/vint_ssb.html

Swan Radio Network http://www.angelfire.com/ny2/hamradio/index.html

Cubic Communications, former manufacturer of both Swan and Cubic amateur radio equipment, has authorized Stephen Judd (formerly Brock Publications) to produce Instruction and Operating Manuals associated with all Swan and Cubic amateur radio communications equipment and accessories.
In recent years, Atlas and Siltronix Radio manuals have been added to the list of available publications.

Orders and inquiries can be made to:

STBJ Productions
Stephen Judd
1503 East Highland Trails Rd
Enoch Utah 84720
(435) 867-1431
SwanRadios@Yahoo.Com

"I want to know about the tunning pots that are located in the back of the unit.  How do you set them up."
You don't.
 
This is a very nice amplfier that will last your lifetime -- if properly operated and cared for.

Please follow-up Steve's (WIK) suggestions.

People who repair HF amplifiers -- see far too many problems caused by broken ferrite core slugs -- due to improper tools -- that damage these cores.  
Keep that 'golden screwdriver' in your pocket.

Ameritron AL-811H Linear Amplifier Instruction Manual (Acrobat version)
http://www.ameritron.com/man/pdf/AL-811H.pdf

Text Version (Omega Electronics)
http://www.omega-electronics.com/al811hm.html

w9gb

I always visually inspect new equipment acquistions (just like autos and trucks) some people care or their equipmnet -- while others deglect or abuse their equipment.

Ken Kemski has a good web page for Kenwood Hybrids
http://www.k4eaa.com/

FAQ for Kenwood Hybrids
http://www.k4eaa.com/faq.htm