Hello

Please send me a copy as well.

Thanks

storebro5000@...

Regards Joakim

--- In Racal-manpacks@..., Meindert de Jong
<dejongmeindert@...> wrote:

Vincent,

Please send me a copy of the manuals.

tnx, Meindert de Jong PA3BVN
e-mail : dejongmeindert@...

Vincent Borg <schatzperson@...>

wrote: I have the operators manual
for TDED type MA4450 and full tech. manual

for encryption unit type MA4224.
Both are pdf files too large to download in the groups files

section.

If anyone wants one just email me, and I'll reply attaching a

copy,

Regards all,
Vincent
9H5SP






---------------------------------
Sponsored Link

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Hello

I have just bought a MA4224, is it possible to get a copy of your
manual? Haveserach for it and not found anything:

Also will this work with any military radio with 7 pin clansman
connectors.

Best regards Joakim
New member

--- In Racal-manpacks@..., "Ira J. Moser" <ira@...>
wrote:

Hi Vincent,

I did the same as you. Opened the thing, and applied 12 volts to

the

fuse, ground to the case.....
Shelved the stuff to attack it later ;)

Same as the PRC319 with the flakey power switch, and bad TURF. :)

--Ira

Vincent Borg wrote:

Hi Ira,
So Far I have one MA-4450 working ( at least seens to show the

right

stuff on the screen) and the other just like yours: leds on and
display crazy. I remember reading somewhere that these beasts

suffer

from an unusual interconnecting system between the

boards...there

are narrow flexible bits with tiny tiny wires inside that are
supposed to make the connections via the pressure of the screws

that

hold the boards in place. It appears that the things shrink with

age

or something and the contacts become marginal. You can take them
apart and solder ribbon cable instead of the rubber thingies.

This

is no small job, you will need the following:
1) Nerves of high tensile steel.
2) Valium or something !
I want to give a shot repairing the non working one when I am
feeling more in the mood (Just done my backdated tax return ).
I always wondered if these units use the same format and

protocol as

the prc319 emu. It would be interesting to try themm out with

some

other guys on HF.
Oh, one last unnerving thing about the MA4450: I have the right
plug, but could not power it up from any of pins !
I took the cover up and supplied 12 volts to the power fuse

inside

and it worked. I dont know whay it should do this, I mean its

meant

to be powered up from the radio plug. Perhaps it will only work

on

24 volts from the plug. I am not prepared to risk this before I

get

more details. How did you power yours up ? If from the radio

plug,

which pins ?
About the MA-4224 encryption units:
Both internal memory batteries are dead and leaking. I removed

both.

I was trying to figure out what kinda batteries these are; well

they

are 3 cell construction.... and when I powered up with an

external

supply I measured 10v across the battery terminals. This would
indicate a constant current charging system , perhaps for a

nicad.

However 3 nicad cells is barely 4 volts; I would have thought

that

with 25 year old technology the memory backup would be at least

5

volts, but I am only guessing here.

The good news is that I am getting a full manual for the MA4224

and

some more info for the MA4450.

I will keep you posted.
I am interested to know how youn powered up your MA4450 and at

what

voltage.

Regards
Vincent



--- In Racal-manpacks@..., "Ira J. Moser" <ira@>
wrote:

Seconded, also :)

Were you able to get the things powered-up, Vincent? On

application of

power, the only thing my units did, was light up all the LEDs

and

do

nothing useful......

--Ira

Vincent Borg wrote:

Does anyone have the pinouts for the audio connector on the

Racal

T.D.E.D. type MA-4450, data messaging device (MEROD).

Thanks in advance,
Vincent






Yahoo! Groups Links

--
Ira J. Moser, Owner, MECO
TEL: (425) 788-0208
FAX: (360) 794-8754
WEB: www.meco.org
EMAIL: ira@


Orwell was an OPTIMIST!

Yahoo! Groups Links

--
--
--
Ira J. Moser, Owner, MECO
Tel: (425) 788-0208
Fax: (360) 794-8754
Web: www.meco.org
Email: ira@...

Orwell was an OPTIMIST!

开云体育

in the on positon there should be no tone just
carrier, if i remember correctly the vtone is engaged
rec and tx only in the rebroadcst position...jim,
kd7kmy
--- Ron Price <ron.price2@...> wrote:

Hi All,

Can anyone tell me how to disable the 150Hz pilot
tone on the TRA-967?

Many thanks,

Ron GW4EVX

____________________________________________________________________________________
Sponsored Link

Degrees online in as fast as 1 Yr
MBA, Bachelor's, Master's, Assoc

Ron Price wrote:

Hi All,

Can anyone tell me how to disable the 150Hz pilot tone on the TRA-967?

Many thanks,

Ron GW4EVX

There's a level control preset that has a 1 k Ohm resistor in series with it, R59. Lifting one end of that will disable the tone.
Dan
ac6ao / g3ncr

Hi All,

Can anyone tell me how to disable the 150Hz pilot tone on the TRA-967?

Many thanks,

Ron GW4EVX

--- In Racal-manpacks@..., Dan Rae <danrae@...> wrote:

dc6bn wrote:

Hello all,

Is there someone out within the UK who could give me a source for
those little fuses 5 x 16 mm as used in the above-mentioned radios,
please?

Battery pack MA 928 requires a 7 Amp fuse.
The TRA921 has got a fuse at its back, but value is unknown to me.
The TRA931 has got a fuse inside, apparently 1 Amp.

They were much used on the earlier Racals, the RA1217 and RA1772 for
example, before the 5 x 20 mm size became the international

standard. I

have never been able to find a source in the US, and my stock is almost
gone, so I'd appreciate a source as well! The obvious places like RS
don't seem to have them.
I have in the past repaired these out of desperation, but buying some
would be a lot easier.
73
Dan
ac6ao / g3ncr

to: Dan Rae,
many thanks for your comments, please see below.

to: All Stations:
I found in the meantime that Farnell is offering this type of fuse.
Some details:

7 A fuse: Belling Lee No. L-562 7A, Farnell No. 534535 or 9688056,
fast blow.

1 A fuse, fast blow: Belling Lee No. L-562 1A, Farnell No. 9688013.
1 A fuse, slow blow: Belling Lee No. L-754/PCB/1, Farnell 1207153.

Inside the USA try Newark InOne.
Countries not having a Farnell branch, see Belling Lee website:
www.blpcomp.com, go to distributors.

73, Peter, DC6BN+

dc6bn wrote:

Hello all,

Is there someone out within the UK who could give me a source for
those little fuses 5 x 16 mm as used in the above-mentioned radios,
please?

Battery pack MA 928 requires a 7 Amp fuse.
The TRA921 has got a fuse at its back, but value is unknown to me.
The TRA931 has got a fuse inside, apparently 1 Amp.

They were much used on the earlier Racals, the RA1217 and RA1772 for example, before the 5 x 20 mm size became the international standard. I have never been able to find a source in the US, and my stock is almost gone, so I'd appreciate a source as well! The obvious places like RS don't seem to have them.
I have in the past repaired these out of desperation, but buying some would be a lot easier. 73
Dan
ac6ao / g3ncr

Guys,
anyone who wants a copy of these manuals needs to send me an email
schatzperson@...
I cant attach docs if I click your reply button in your profile.

Regards all
Vincent


--- In Racal-manpacks@..., dave cooke <madcomms@...>
wrote:

hi vincent
i would be very grateful if you could send me a copy

of the MA4224 manual as i just picked one up and have no info.

regards dave G8TDP

Vincent Borg <schatzperson@...> wrote:
I have the operators manual for TDED type MA4450 and full

tech. manual

for encryption unit type MA4224.
Both are pdf files too large to download in the groups files

section.

If anyone wants one just email me, and I'll reply attaching a copy,

Regards all,
Vincent
9H5SP





Send instant messages to your online friends

I have the operators manual for TDED type MA4450 and full tech. manual
for encryption unit type MA4224.
Both are pdf files too large to download in the groups files section.
If anyone wants one just email me, and I'll reply attaching a copy,

Regards all,
Vincent
9H5SP

Send instant messages to your online friends http://uk.messenger.yahoo.com

Vincent,

Please send me a copy of the manuals.

tnx, Meindert de Jong PA3BVN
e-mail : dejongmeindert@...

Vincent Borg wrote:

I have the operators manual for TDED type MA4450 and full tech. manual
for encryption unit type MA4224.
Both are pdf files too large to download in the groups files section.
If anyone wants one just email me, and I'll reply attaching a copy,

Regards all,
Vincent
9H5SP

---

Sponsored Link

Hi Vincent,
Perhaps you could email me a copy please to this Email address as
there is a restriction on the one that I am currently using for
everyday use
gm0kzx@...
Thanking you
Regards
Barrie GM0KZX

--- In Racal-manpacks@..., "Vincent Borg"
<schatzperson@...> wrote:

I have the operators manual for TDED type MA4450 and full tech.

manual

for encryption unit type MA4224.
Both are pdf files too large to download in the groups files

section.

If anyone wants one just email me, and I'll reply attaching a copy,

Regards all,
Vincent
9H5SP

Hello all,

Is there someone out within the UK who could give me a source for
those little fuses 5 x 16 mm as used in the above-mentioned radios,
please?

Battery pack MA 928 requires a 7 Amp fuse.
The TRA921 has got a fuse at its back, but value is unknown to me.
The TRA931 has got a fuse inside, apparently 1 Amp.

Many thanks.
73
Peter, DC6BN+

开云体育

Hello Vincent,

Both are pdf files too large to download in the groups files section.

If anyone wants one just email me, and I'll reply attaching a copy,

Could you send me copies? Thanks,

Tom Bryan

Dan,

Thanks for the great help. I have made the wire-ing and all works well.
And the? PDF file I can't printing the manual, but there must be a methode
to do this. when I know it I give you the information how to do it.


tnx,? Meindert de Jong PA3BVN


Dan Rae wrote:

>
>
>I have found 2 encryption units MA4204, but now the problem, no info
>Who can help me????.....
>
>Meindert de Jong PA3BVN
>

I have never found the manuals for this one. However a lot of the
circuitry and some of the boards are the same in the MA4014 which I did
find on line, but it is in a pdf format that does not permit printing it
out. As I have never been able to work on things on the bench and refer
to a computer screen with only part of the circuit visible at the other
side of the room this did not really help me to get mine going... But
you may be luckier!
73
Dan
ac6ao / g3ncr

p.s. I don't know where it was but google may help.

---

Everyone is raving about

I have the operators manual for TDED type MA4450 and full tech. manual
for encryption unit type MA4224.
Both are pdf files too large to download in the groups files section.
If anyone wants one just email me, and I'll reply attaching a copy,

Regards all,
Vincent
9H5SP

I have found 2 encryption units MA4204, but now the problem, no info Who can help me????.....

Meindert de Jong PA3BVN

I have never found the manuals for this one. However a lot of the circuitry and some of the boards are the same in the MA4014 which I did find on line, but it is in a pdf format that does not permit printing it out. As I have never been able to work on things on the bench and refer to a computer screen with only part of the circuit visible at the other side of the room this did not really help me to get mine going... But you may be luckier!
73
Dan
ac6ao / g3ncr

p.s. I don't know where it was but google may help.

I have found 2 encryption units MA4204, but now the problem, no info
Who can help me????.....

Meindert de Jong PA3BVN

---

Everyone is raving about

Just an update, spent today looking at the ma4450, and managed to get
it to power up now.
Here's what I did, looking at the 1802 micros on the three pcb's there
was no clock on pins 1 and 39.
I followed it from the frontpanel down the grey ribbon cable to
knowhere.
After removing the 'middle' pcb of the three they are connected together
using rubber strips with wire in them, similar to 'zebra strips'.
Having had trouble in the past many times with these type of
connectors, especially after they get damp and have aged, I removed
them.
I made up some jumpers from very thin ribbon cable and replaced them.
Applying power, the unit now powers up and 'seems' to work, it says
unit ok anyhow.
Just got to work out how to make it do something now ....

Just a suggestion for others who have a 'duff' looking unit.

Regards
Tony