Help
I've just picked up an HF Power amplifier module, it's still bolted to it's
heatsink and looks as though it may be from an amateur or commercial
transceiver. the output pair are in a big (0.5"pill) 211-xx package and are
marked as ST devices with the numbers 3 100 2 2 on one line and 286M
beneath, the driver transistor is in a smaller 211 type package, has no
maker's mark but has 31-0021 with 9005 beneath. I've tried searching some
combinations but haven't come up with any likely part numbers - I'd
appreciate any help in identifying the devices before I apply power and do
some tests. The only markings on the board are "BM-1" where the B is
slightly above the M and there's a Motorola TIP31 bias regulator - I'm
guessing it's not out of a Japanese set because of the device types? The
seller didn't know anything about it's background but reckoned a friend had
run a test and got 100W out for 250mw in and quoted it as capable of 250W.
Any help appreciated.
Thanks
John
MW1FGQ

"owen.home" wrote in message
...
Help
I've just picked up an HF Power amplifier module, it's still bolted to
it's
heatsink and looks as though it may be from an amateur or commercial
transceiver. the output pair are in a big (0.5"pill) 211-xx package and
are
marked as ST devices with the numbers 3 100 2 2 on one line and 286M
beneath, the driver transistor is in a smaller 211 type package, has no
maker's mark but has 31-0021 with 9005 beneath. I've tried searching some
combinations but haven't come up with any likely part numbers - I'd
appreciate any help in identifying the devices before I apply power and do
some tests. The only markings on the board are "BM-1" where the B is
slightly above the M and there's a Motorola TIP31 bias regulator - I'm
guessing it's not out of a Japanese set because of the device types? The
seller didn't know anything about it's background but reckoned a friend
had
run a test and got 100W out for 250mw in and quoted it as capable of 250W.
Any help appreciated.
Thanks
John
MW1FGQ


The usage of word "pill" is a "slang" word for RF transistors (bi-polar or
MOSFET) originated in US by non-technical radio operators.

Popular MRF/SRF RF transistors
http://www.rfparts.com/mototran.html

The 211 case style was very popular for bi-polar devices
http://www.rfparts.com/trancase.html

If you are aware of the voltage required (12/13.8; 24/28 or 48/50 VDC),that
would be useful in reducing your search candidates. Specifications:
http://www.rfparts.com/transistorspecs.html

You can inquire with RF Parts if you desire a cross reference - for future
replacement.
http://www.rfparts.com/product.html

Handling RF Transistors
http://www.rfparts.com/install.html

w9gb

The usage of word "pill" is a "slang" word for RF transistors (bi-polar or
MOSFET) originated in US by non-technical radio operators.

Popular MRF/SRF RF transistors
http://www.rfparts.com/mototran.html

The 211 case style was very popular for bi-polar devices
http://www.rfparts.com/trancase.html

If you are aware of the voltage required (12/13.8; 24/28 or 48/50 VDC),that
would be useful in reducing your search candidates. Specifications:
http://www.rfparts.com/transistorspecs.html

You can inquire with RF Parts if you desire a cross reference - for future
replacement.
http://www.rfparts.com/product.html

Handling RF Transistors
http://www.rfparts.com/install.html

w9gb



These are useful pointers.
I am in the same situation as the original poster.
I have been given a bunch of RF power transistors (316-01 and 244-04 type
packages). I have been unable to identify them. The giver tried to find the
information where he works (they were being thrown away) but he can't find any
information.

Transistor 1 markings: C / M2519 / 185 / 9014 / RR15
the bag is labelled RF 10W UHF

Transistor 2 markings: C / 185 / 4340P3 / 8817 / MALAYSIA
the bag is labelled RF 12W VHF

Transistor 3 markings: C / (Motorola Wing) / 8133P1 / 8919 / MALAYSIA
the bag is labelled RF PA 28W VHF

Transistor 4 markings: C / 4340P1 / 8824 M52 / (logo)
the bag is labelled RF 4W VHF
these have logos of ST or Thompson CSF

The second from last line four digit number is the date code. In some cases
there are more than one transistor and this line does vary.

I Have tried adding MRF, 2SC, SRF in front of the ID and then I have done a
google, but this has found nothing.

Any ideas?

--Gary

"Gary Morton" wrote in message
. uk...

These are useful pointers.
I am in the same situation as the original poster.
I have been given a bunch of RF power transistors (316-01 and 244-04 type
packages). I have been unable to identify them. The giver tried to find
the information where he works (they were being thrown away) but he can't
find any information.

Transistor 1 markings: C / M2519 / 185 / 9014 / RR15
the bag is labelled RF 10W UHF

Transistor 2 markings: C / 185 / 4340P3 / 8817 / MALAYSIA
the bag is labelled RF 12W VHF

Transistor 3 markings: C / (Motorola Wing) / 8133P1 / 8919 / MALAYSIA
the bag is labelled RF PA 28W VHF

Transistor 4 markings: C / 4340P1 / 8824 M52 / (logo)
the bag is labelled RF 4W VHF
these have logos of ST or Thompson CSF

The second from last line four digit number is the date code. In some
cases there are more than one transistor and this line does vary.

I Have tried adding MRF, 2SC, SRF in front of the ID and then I have done
a google, but this has found nothing.

Any ideas?

--Gary


Gary -

Transworld amplifiers used TRW transistors, but I believe those transistors
started with a "9". Some of the former RF designers from that time can be
found at QRZ.COM (Question and Answer forum).

gb

"gb" skrev i en meddelelse
...
"Gary Morton" wrote in message
. uk...

These are useful pointers.
I am in the same situation as the original poster.
I have been given a bunch of RF power transistors (316-01 and 244-04
type
packages). I have been unable to identify them. The giver tried to find
the information where he works (they were being thrown away) but he
can't
find any information.

Transistor 1 markings: C / M2519 / 185 / 9014 / RR15
the bag is labelled RF 10W UHF

Transistor 2 markings: C / 185 / 4340P3 / 8817 / MALAYSIA
the bag is labelled RF 12W VHF

Transistor 3 markings: C / (Motorola Wing) / 8133P1 / 8919 / MALAYSIA
the bag is labelled RF PA 28W VHF

Transistor 4 markings: C / 4340P1 / 8824 M52 / (logo)
the bag is labelled RF 4W VHF
these have logos of ST or Thompson CSF

The second from last line four digit number is the date code. In some
cases there are more than one transistor and this line does vary.

I Have tried adding MRF, 2SC, SRF in front of the ID and then I have
done
a google, but this has found nothing.

Any ideas?

--Gary


Gary -

Transworld amplifiers used TRW transistors, but I believe those
transistors
started with a "9". Some of the former RF designers from that time can be
found at QRZ.COM (Question and Answer forum).

gb


I can probably provide a little more information: The designations 4340P3,
8133P1 and 4340P1 are most likely abbreviated internal type
designations/stock no. used by General Electric (and by the Danish company
Storno that was acquired by GE and later by Motorola). The full number might
be something like e.g. 19J704340P1, almost all designations starting with
19J...

Unfortunately, I have no longer the xref lists between the 19J-numbers and
the more common mfg. designations.

vy 73

--
Sven Lundbech
OZ7S, OZ1AWJ
President EDR