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Seeking battery information/source

 

Evening all,
?
I'm after some information about a battery for the PRM4720/4515.
?
I have a charged battery (which soon won't be!) that I'm hoping to re-cell with three Lithium 18650 batteries and associated BMS. The battery that I have appears to be larger than typical batteries for this series of radios, in that its case is approximately 75mm high, hence why I think I can fit the 18650's in it.
?
So, two questions:
1) Can anybody tell me the correct part number for this larger battery pack?
2) Does anybody know of a source of this battery type (dead or alive)?
?
Unfortunately, the pack is devoid of any markings apart from a Red Racal label with a stick-on serial number label.
?
Any help appreciated.
?
Keith
?
Re: [Army-Radios] Fw: STOLEN radio PLEASE READ

 

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So very Sorry to hear this, Stuart. Do you remember the serial number of the radio and the VIU? I know they are easily removable, but may help more if known by everybody who moves in these circles.
73,
Warren


On 5 Aug 2024, at 19:29, Stuart Mckinnon via groups.io <stuartjmckinnon@...> wrote:

?
Ladies and Gents

Please diseminate

Stuart

G0TBI

This happened at an event at South Cerney on the weekend

----- Forwarded message -----
From: Stuart Mckinnon <stuartjmckinnon@...>
To: VMARS groups.io <[email protected]>
Sent: Monday, 5 August 2024 at 19:18:18 BST
Subject: STOLEN radio PLEASE READ

For those of you not on the various FB and WA groups that my Military vehicle Colleagues helped me with on Sunday


On Saturday Night/Sunday Morning, My Lightweight or Airportable Land Rover was attacked and my Racal 2000 'V' was ripped out, by thieves, they removed the control cable and Coax Connector from the front of the VIU, but could not fathom how to disconnect the DC 2 Pin Larger Racal Power plug, so they yanked it away with the DC plug still in situ, leaving pos and Neg/Shield remnants of the cable behind, it was a good job I always switch off the Dist box.

This must have been someone who had visited the VMARS compliment, and seen me talking or demoing the radio, who clearly took a shine to it, relieving me of it in the early hours


The Theft has been logged with Glos Police and I am awaiting a Crime Number from SOC,

Please keep your eyes peeled for a E Bay or Market Place of any other area that Mil radio is offered

There is a Substantial reward offered for information received leading to offenders and or return of Eqpt

This photograph is dated Jun 2023 and luckily that was in my gallery on my Phone

If you can help contact me privately.


Tank you

Stuart
G0TBI

07860 496516

Please feel free to diseminate this msg far and wide and maybe it will come to light!
<WhatsApp Image 2024-08-04 at 12.18.13_a6f46076.jpg>
Fw: STOLEN radio PLEASE READ

 

Ladies and Gents

Please diseminate

Stuart

G0TBI

This happened at an event at South Cerney on the weekend

----- Forwarded message -----

From: Stuart Mckinnon <stuartjmckinnon@...>
To: VMARS groups.io <[email protected]>
Sent: Monday, 5 August 2024 at 19:18:18 BST
Subject: STOLEN radio PLEASE READ

For those of you not on the various FB and WA groups that my Military vehicle Colleagues helped me with on Sunday


On Saturday Night/Sunday Morning, My Lightweight or Airportable Land Rover was attacked and my Racal 2000 'V' was ripped out, by thieves, they removed the control cable and Coax Connector from the front of the VIU, but could not fathom how to disconnect the DC 2 Pin Larger Racal Power plug, so they yanked it away with the DC plug still in situ, leaving pos and Neg/Shield remnants of the cable behind, it was a good job I always switch off the Dist box.

This must have been someone who had visited the VMARS compliment, and seen me talking or demoing the radio, who clearly took a shine to it, relieving me of it in the early hours


The Theft has been logged with Glos Police and I am awaiting a Crime Number from SOC,

Please keep your eyes peeled for a E Bay or Market Place of any other area that Mil radio is offered

There is a Substantial reward offered for information received leading to offenders and or return of Eqpt

This photograph is dated Jun 2023 and luckily that was in my gallery on my Phone

If you can help contact me privately.


Tank you

Stuart
G0TBI

07860 496516

Please feel free to diseminate this msg far and wide and maybe it will come to light!

WhatsApp Image 2024-08-04 at 12.18.13_a6f46076.jpg

TRA967 Whips Available

 

Hi all,
?
I have 2 off 2.45m whips 711036 for the TRA967 available, new and unused. These have the smaller diameter mating end than the HF whips. UK based. Drop me a pm for more details and photos.
?
Martin
G4NCE
Racal equipment for Sale

 

Hi,
All of the equipment listed below is from the estate of G4DDN (SK). I have been asked by the family of G4DDN to dispose of this equipment, all proceeds will go to the family.

I need to dispose of these items ASAP so all offers will be considered. All items are offered 'as seen' and untested. If you have any questions, I'll try to answer them.

Please send offers direct to me at ian.g0fct@...

All items are located in Bracknell, Berkshire.

Racal Receivers
1. RA1784 HF Receiver (no front panel, SCORE remote control)
2. RA1784 HF Receiver chassis, no cosmetic front panel, 1st Mixer, ISB IF and IF Filter boards not fitted.
3. MM610. RF section of RA1781 (HF Receiver). No front panel, designed to be remote controlled only (needs MS611 or equivalent control board). Mounted in a test/assembly frame (heavy). Two units available, some original Racal Test Department documentation included.

RA1792 circuit boards
1. Front Panel Memory (A9A2) A08234 A1 BS 1 SN353 (green solder resist, curved/wavey tracks)
2. Front Panel Memory ST82920 BS 2 SN 11282
3. Front Panel Memory ST82920 BS 2 SN 29760
4. Second LO/BFO Synthesizer Module A8 ST82916 BS 1 SN RT1029
5. Microcomputer Board (A6A2) ST89212 BS 01. Complete with CPU, SMI and RAM. No EPROMs
6. Microcomputer Board (A6A2) ST89212 BS 01. RAM present. No CPU, SMI or EPROMs
Whip Antenna Swap?

 

Hi all,
?
I have a new-in-packet 2.45m whip 711036 for the TRA967 which I don’t need. I do need a whip for the Squadcal, 711017, new or used, to try out on my set. Would anyone like to swap antennas? I am UK-based.
?
Thanks.
?
Martin
G4NCE
Re: Wanted Details / Circuit for IF convertor 4100020

 

Answering my own query...? It is indeed a wideband IF converter from 40.455 MHz to 21.4 MHz, designed to cope with a very wide range of signal levels.? It takes the IF input from before the first mixer roofing filter, amplifies that, and splits it.? One half returns to the receiver roofer, the other goes to a filter and +23 dBm level mixer fed by a 61.855 TCXO to give a 21.4 MHz 500 kHz wide spectrum.? Lots of LC filtering at various points and provision on the PCB for pads to set levels.? It runs off a single 15V supply.?? I shudder to think what this cost, the price of the high level MCL mixer alone is more than I paid for the whole thing.

Dan

ac6ao / g3ncr
RT422B

 

Hi everyone, I am restoring an RT422B, it is complete with PSU, cables etc. Very little information on the WWW. I actually used this rig to talk to Dave Dave Larsen, years ago. It has been mothballed for 20 years but I want to get it up and running again. Any help will be appreciated. Thank you, Ludwig ZS5CN.?
TR38C

 

Cleaning out a TR38C, the circuits are close to the TR28, but I am hoping someone has a manual or at least the circuit diagramme. Cannot find anything on the WWW. Any assistance will be appreciated! Thanks, Ludwig ZS5CN.?
Re: Racal Cougar battery chemistry?

 

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Hi Petr
Sorry I missed the bit about it being a battery magazine! ?The batteries I have bought from Axess are lasting well and about ?40! ?They are slightly larger than the original issue ones. They fit the racal 4742 too!
Robin?
G?GNE

On 12 Jul 2024, at 11:35, Petr Ourednik <indians@...> wrote:

?Hello Robin,

thanks for hint. It seems interesting even although I was thinking about MA-4516B which is the container for 8x AA cells.
It seems to be more flexible as cells can be replaced when they have died.
I will try to contact them to check the availability and price.

regards,
Petr OK1RP

Re: Racal Cougar battery chemistry?

 

Hello Robin,

thanks for hint. It seems interesting even although I was thinking about MA-4516B which is the container for 8x AA cells.
It seems to be more flexible as cells can be replaced when they have died.
I will try to contact them to check the availability and price.

regards,
Petr OK1RP
Re: Racal Cougar battery chemistry?

 

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Robin?
G?GNE

On 11 Jul 2024, at 15:46, Petr Ourednik <indians@...> wrote:

MA-4516B

Re: Racal Cougar battery chemistry?

 

Hi folks,

is it possible to find somewhere the MA-4516B battery pack please?
My lithium battery pack is dead (both of them I have) and I have no idea how to power
it except using it together with TA-4523 .

Many thanks,
Petr, OK1RP

Re: FS: RA6790/GM

 

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Has anyone compiled this into a burnable hex file?

On 6/22/2024 1:40 PM, gewingerd@... wrote:
Open under notepad to read

---------- Original Message ----------
From: "Jim Davey K8RZ" <377ohmz@...>
To: [email protected]
Subject: Re: [RacalRadio] FS: RA6790/GM
Date: Sat, 15 Jun 2024 01:52:09 -0700

Check with Gary Wingerd.? I bought new EPROMs from him, but it was probably 10-11 years ago.?

Virus-free.

--
MOGMAN

Re: RA6790/GM A6A2 boards

 

a6a2@...
A6A2
@
talktalk
.com
Here is my buddy Morse .- -.... .- ..--- .--.-. - .- .-.. -.- - .- .-.. -.- .-.-.- -.-. --- --

Re: Racal Cougar battery chemistry?

 

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?Hi Damien, these normally had a big yellow sticker on the back that said “this radio is not secure”.

? Internally the pins on the encryption board should have 4 jumper wires to bypass the CVSD module.

? More information is here and well worth a read.



De Spence G5STO

Sent while portable! please excuse typos.

On 1 Jul 2024, at 20:20, Damien via groups.io <gorby928@...> wrote:

?Ah ok cool that's clever.I didn't think it was the battery but it did have me guessing ?.
I haven't tried A/B setting as the guy I purchased the Couger from told me it didn't have the encryption fitted.
Loving the set.(Lots to learn)
73 Damien?
2E0EUI?

Re: Racal Cougar battery chemistry?

 

Ah ok cool that's clever.I didn't think it was the battery but it did have me guessing ?.
I haven't tried A/B setting as the guy I purchased the Couger from told me it didn't have the encryption fitted.
Loving the set.(Lots to learn)
73 Damien?
2E0EUI?

Re: Racal Cougar battery chemistry?

 

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Hi Damian, it means you’re in clear mode (ie: not encrypted) as these radios also offered an encryption module. If you hear a constant 1hz roughly blip, it reminds the user that you’re speaking on an open channel and not to discuss sensitive information.

? Incidentally, if you switch to A and B do you hear a constant tone? It means with the encryption module isn’t installed or not programmed. I feel you will hear a constant tone.

? De Spence G5STO

Sent while portable! please excuse typos.

On 1 Jul 2024, at 17:58, Damien via groups.io <gorby928@...> wrote:

?Hi Bob
Thanks for the reply yeah I did some digging and found the same answer but thank you for the confirmation. I have discharged and recharged my SMT battery now and had a couple of QSOs with the Couger (I love it). One more question if I may while using the radio there is a constant but soft blip tone. I thought it was low battery tone like the Clansman kit but I have recharged it now and it's still there and I can't find out what it means ?

Re: Racal Cougar battery chemistry?

 

Hi Bob
Thanks for the reply yeah I did some digging and found the same answer but thank you for the confirmation. I have discharged and recharged my SMT battery now and had a couple of QSOs with the Couger (I love it). One more question if I may while using the radio there is a constant but soft blip tone. I thought it was low battery tone like the Clansman kit but I have recharged it now and it's still there and I can't find out what it means ?

Re: Racal Cougar battery chemistry?

 

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They are nicad. But they are getting old now and individual cells are failing!
Robin?
G?GNE

On 1 Jul 2024, at 13:10, Damien <gorby928@...> wrote:

?Hi all
I'm new to the Racal Cougar kit and I picked up a 144mhz unit at a rally yesterday. My question is what is the chemistry of the main battery on the SMT unit for charging purposes ?
I have a NIMH for the radio itself but I read there are also Nicad cell packs so I just want to charge it correctly, thanks ??

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