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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

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

Mark This is the closest I can see on the bay??https://www.ebay.co.uk/itm/286159316580 Stuart G0TBI

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

Hi George, If you have a working VIU I would be happy to purchase from you. Cheers Mark

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

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

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

David, I may have one. There was no picture in your email. 73, Ian G0FCT

Does anyone have in their parts box a skirted / fluted knob similar to the one in the picture? The skirt is about 1” or 25mm diameter and the centre hole will be about 3mm diameter. I think there

HI, If your not fixed up? ? Give me a ring. Jeff? G8XXI

In case any colleagues are interested, I have a Racal Syncal 30 TRA931 transceiver for sale. In operation. They are advertised on a well-known auction portal. 315 euro. Search for "MILITARY

Good afternoon, Does anyone have an operating manual for one or both of these units? Best regards Mark

thanks Dave, Sorted !

HI Group, Looking foa a faceplate for the above power amp, if anyone has one there willing to sell ? Jeff? G8XXI

Hi Terry I'm not sure if our club does advertise its sales as you describe but it sounds like a good idea and I will put it to the secretary. They hold two a year and are advertised on the web

Hi Terry Thanks for the TA940B dope. Nice piece of kit. 100W PEP 100% duty cycle. The MA 79 delivers 100mW into 75 ohms. The TA940B requires 5W PEP input+- 3 dB into 50 ohms so at least 2.5W PEP.

Hi Mike, Thank you for your post. May I ask if your club secretary is announcing the auction to other clubs? A radio club in Christchurch circulates their monthly auction dates to other club

Hi Richard, Is TA940B_Amplifier.pdf <http://www.vmarsmanuals.co.uk/archive/4026_TA940B_Amplifier.pdf> any help? 73s Terry Zl1NOW [email protected]> wrote:

Peter, The RA1779 should be more sensitive than the RA6790 and it is normal for the receiver to be more sensitive in the WB position (less loss in WB mode). I would start by looking closely at the RF