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Re: Racal Panther 10pin to Clansman 2pin 24v
¿ªÔÆÌåÓýI found my scribbled notes, the DC path actually isolates the antenna post rather than enabling the BNC see notes attached hopefully the attachment will be visible
On 27/01/2025 15:41, George Hogan via
groups.io wrote:
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Re: Racal Panther 10pin to Clansman 2pin 24v
The DC path enables the BNC, there is a pin diode switch inside the box behind the BNC socket any antenna with a DC path to ground will work, I had to replace the pin diode in my radio as it wasn't switching properly leading to higher than normal tx harmonics On 27 January 2025 14:59:03 GMT, "HT011 via groups.io" <markwalton21@...> wrote:
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Re: Racal Panther 10pin to Clansman 2pin 24v
I'm not sure on that as you can connect it to an external antenna even in the manpack configuration without a 24v supply.
On Monday 27 January 2025 at 14:50:26 GMT, George Hogan <george@...> wrote:
One other thing that popped into my head with these radios is that the BNC antenna socket must have a DC path to ground in order to switch the pin switch away from the whip socket. The viu has a couple of k ohm resistor in it for this purpose. On 27/01/2025 14:44, Scott Dorsey via groups.io wrote: > If the original poster wants to try this and is in the US, I'll send it to > them and they can return it if it doesn't fit or send me postage if it does. > --scott > > > > > |
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Re: Racal Panther 10pin to Clansman 2pin 24v
One other thing that popped into my head with these radios is that the BNC antenna socket must have a DC path to ground in order to switch the pin switch away from the whip socket. The viu has a couple of k ohm resistor in it for this purpose.
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On 27/01/2025 14:44, Scott Dorsey via groups.io wrote:
If the original poster wants to try this and is in the US, I'll send it to |
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Re: Racal Panther 10pin to Clansman 2pin 24v
If the panther is the same as the yeoman it will mate, the pei-genesis catalogue show it as a 26482 connector in normal keying, it's the great thing about standards - there are so many!
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On 27/01/2025 14:35, Scott Dorsey via groups.io wrote:
Okay, so that would be a 10-12 insert with the cable end being female |
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Re: Racal Panther 10pin to Clansman 2pin 24v
On the yeoman radio the required mating cable socket is a size 12 shell 10 way MIL-DTL-26482 socket with 'N' normal keying, e.g 62GB-56T12-10SN.
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Curiously the Yeoman VIU has 'F' keying on it's end of the cable and 'N' on the radio end, it would be wise to check the keying type on the panther radio in case it is different, the Amphenol 62GB catalogue down-loadable online shows diagrams of the various keyway options for different shell sizes, the keyway angles are pretty easy to figure out from that. My home made cable has 0V on Pin 'E' and +V on Pin 'B', I see I also linked 'B' to 'G' via a 15k ohm resistor, it was over ten years ago when I made the cable (originally for 12V use) and sadly I can't remember if that resistor was definitely required, the panther radio may need a potential divider to drive the pin or nothing at all. When 24V is applied it enables the high power setting in the radio menu, 12V only lists low and medium power. Cheers George On 27/01/2025 13:53, Scott Dorsey via groups.io wrote:
So what is the insert number for the 10-pin connector? |
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Re: Racal Panther 10pin to Clansman 2pin 24v
Yes I've got mine with 20w via the rear 10 pin at the moment. I'm also scared to try via the battery socket so was hoping someone had confirmed this working. I see for the Yeoman they do make a 24v battery for them. Cheers Mark
On Monday 27 January 2025 at 13:22:53 GMT, George Hogan <george@...> wrote:
Hi Mark For what it's worth I have a yeoman TRA3900 which is a very
similar radio, this does transmit at 20W when given 24V into the
rear 10 pin socket, I have not tried that via the battery posts
for fear of breaking it! Cheers George G8MAU On 27/01/2025 13:19, HT011 via
groups.io wrote:
Hi Stuart,
I saw that I might have to rig up an adaptor.
Has anyone tried to power it with 24v via the battery
socket? I have the power adaptors but would like some
confirmation it won't break the radio and it will give the 20w
output if powered this way via instead of the 10 pin.
Cheers
Mark
On Monday 27 January 2025 at 13:10:16 GMT, Stuart
Mckinnon via groups.io
<stuartjmckinnon@...> wrote:
Mark
This is the closest I can see on the
bay??
G0TBI
On
Monday, 27 January 2025 at 12:29:48 GMT, HT011
via groups.io
<markwalton21@...> wrote:
Good afternoon,
?
Does anyone have a source of a Racal 10
pin (radio rear socket) to a 2pin Clansman
style power input. To power the radio with
24v in the vehicle clip in mode.
?
Best regards
?
Mark
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Re: Racal Panther 10pin to Clansman 2pin 24v
¿ªÔÆÌåÓýHi Mark For what it's worth I have a yeoman TRA3900 which is a very
similar radio, this does transmit at 20W when given 24V into the
rear 10 pin socket, I have not tried that via the battery posts
for fear of breaking it! Cheers George G8MAU On 27/01/2025 13:19, HT011 via
groups.io wrote:
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Re: Racal Panther 10pin to Clansman 2pin 24v
Hi Stuart, I saw that I might have to rig up an adaptor. Has anyone tried to power it with 24v via the battery socket? I have the power adaptors but would like some confirmation it won't break the radio and it will give the 20w output if powered this way via instead of the 10 pin. Cheers Mark
On Monday 27 January 2025 at 13:10:16 GMT, Stuart Mckinnon via groups.io <stuartjmckinnon@...> wrote:
Mark This is the closest I can see on the bay?? G0TBI
On Monday, 27 January 2025 at 12:29:48 GMT, HT011 via groups.io <markwalton21@...> wrote:
Good afternoon,
?
Does anyone have a source of a Racal 10 pin (radio rear socket) to a 2pin Clansman style power input. To power the radio with 24v in the vehicle clip in mode.
?
Best regards
?
Mark
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Re: Racal Panther 10pin to Clansman 2pin 24v
Mark This is the closest I can see on the bay?? G0TBI
On Monday, 27 January 2025 at 12:29:48 GMT, HT011 via groups.io <markwalton21@...> wrote:
Good afternoon,
?
Does anyone have a source of a Racal 10 pin (radio rear socket) to a 2pin Clansman style power input. To power the radio with 24v in the vehicle clip in mode.
?
Best regards
?
Mark
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Re: Yeoman VIU3901
Quite likely given it's age, not too many tantalums inside though, the transceiver itself can be fussy to start up being a mega complicated trials system hence the idea of a test jig, I will have a measure up, it's nearly all smd and to get at the psu area I will probably need to remove the main board which is quite a lot of disassembly. I have the Panther VIU schematic, the PA looks near identical but the PSU section is quite different.
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Thanks Scott Cheers George G8MAU On 26/01/2025 16:44, Scott Dorsey via groups.io wrote:
I have not worked on the VIU, but usually when devices are in that restarting |
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Re: Yeoman VIU3901
I have not worked on the VIU, but usually when devices are in that restarting
cycle it's because the power supply is crowbarring on overcurrent. And usually when power supplies are crowbarring on overcurrent it is because decoupling capacitors have gone leaky or shorted. An analogue meter is a good tool for verifying this but since there are so many across the same rails it can sometimes be difficult without a low ohms meter to figure out which one is bad. BUT... the good news and the bad news is that if one is bad.... likely more of them are about to go bad.... and mass replacement is often in order. --scott |
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Yeoman VIU3901
Hi group
I have a Yeoman VIU3901 which has a startup issue. The transceiver (TRA3900) does not always start when connected to the VIU, the VIU also continuously power cycles if the transceiver is switched off. Sadly the board is similar but not the same as the later Panther VIU's as it uses bipolar transistors rather than a FET to switch the rear power output on and off. This particular unit looks like it has been worked on post manufacture with quite a lot of smd hand soldering, it may be an early one serial No: 102.
Does anybody out there have any schematic's for these? I know it's along shot.
My next task is to make up a test jig to try and get it going without the transceiver.
Cheers
73's
George
G8MAU |
Ian Pawson G0FCT