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Re: TRA 921 Speaker Pic
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Re: TRA 921 Speaker Pic
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Re: TRA 921 Speaker Pic
¿ªÔÆÌåÓýHi Peter, I don't have your email address but here it is as an attachment. I can't vouch for this schematic. Tom Bryan
On 6/29/2020 4:42 PM, peter via
groups.io wrote:
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Re: TRA 921 Speaker Pic
¿ªÔÆÌåÓýHi Peter, I will send you a PM with a schematic that I have for the Racal speaker. Tom BryanN3AJA On 6/29/2020 4:42 PM, peter via
groups.io wrote:
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Re: TRA 921 Speaker Pic
The external speakers are powered. From: "peter via groups.io" <epkoncept@...> To: "RacalRadio" <[email protected]> Sent: Monday, June 29, 2020 12:42:09 PM Subject: Re: [RacalRadio] TRA 921 Speaker Pic Slowly getting my TRA931 into working condition. Does anyone of the schematic of the companion speaker/amplifier box ? If not, i guess I will DIY one with an LM380 or similar audio amp. |
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Re: TRA 921 Speaker Pic
Slowly getting my TRA931 into working condition. Does anyone of the schematic of the companion speaker/amplifier box ? If not, i guess I will DIY one with an LM380 or similar audio amp. |
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Re: TRA 921 Speaker Pic
And I bought one... KL7AM From: "Alan_Belton via groups.io" <alanbelton13@...> To: "RacalRadio" <[email protected]> Sent: Sunday, June 28, 2020 11:14:13 AM Subject: Re: [RacalRadio] TRA 921 Speaker Pic Tom,? That looks more like it, the red with white stripe mic insert is the dynamic type used with a lot of the Racal kit of that vintage, and also looks like the correct 6 pin plug. 73 Al G8LIT
On 28 Jun 2020, at 18:26, Tom B <tbryan@...> wrote:
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Re: TRA 921 Speaker Pic
¿ªÔÆÌåÓýTom,?That looks more like it, the red with white stripe mic insert is the dynamic type used with a lot of the Racal kit of that vintage, and also looks like the correct 6 pin plug. 73 Al G8LIT On 28 Jun 2020, at 18:26, Tom B <tbryan@...> wrote:
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Re: TRA 921 Speaker Pic
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Re: TRA 921 Speaker Pic
¿ªÔÆÌåÓýThe mic insert is a carbon type (red with a black stripe), and will not work with the Syncal set; the handset is probably the one used with the UK's A-41 No2 manpack, which used a carbon mic element, and had a similar (but differently keyed) 6 pin plug. 73 Al G8LIT
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Re: TRA 921 Speaker Pic
That connector looks different on the outside
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----- Original Message -----
From: "Tom B" <tbryan@...> To: "RacalRadio" <[email protected]> Sent: Saturday, June 27, 2020 7:56:11 AM Subject: Re: [RacalRadio] TRA 921 Speaker Pic I think this is the correct handset. Tom On 6/27/2020 11:27 AM, Tom B wrote: The connectors are fairly easy to come by.? Clansman connectors will |
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Early Syncal Speaker
Found a shorted transistor in the Speaker amplifier. Subbed a replacement in and now have lots of audio. Listening to a net here on 3.933 and the receiver sounds very good and on frequency as well! Now I need a 18V power supply or rebuild the battery pack. I do have the charger. I haven't opened the battery pack but I am pretty sure the nicads are junk. I also need a microphone. Anyone want to trade a speaker for a microphone? Marty KL7AM |
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Re: TRA 921 Speaker Pic
The one on the right is either an MA909 or MA988. The one on the left I don't recognize. The MA909 is wired B +supply, F audio in, D ground and is 18V The MA988 is wired B +supply, F Audio in, D ground and is 18-30v but will work with reduced output down to 10v The MA988B is wired? A Ground, B Audio in, C Ptt, E +supply The MA988C is wired C +supply, D audio in, E ground, F Ptt and should have a 7 pin Clansman plug |
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Re: TRA 921 Speaker Pic
Agree, 6 pins for the TRA931
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How about this handset.? It has 6 pins and a white strip on the mic. Tom On 6/27/2020 1:36 PM, KB0SFP via groups.io wrote:
Yes it is 6 pins, but so too is the clansman of the same period. The connectors on my clansman audio devices(as well as early Southcom) look identical. But as Tom says, the index pins are different. |
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Re: TRA 921 Speaker Pic
Yes it is 6 pins, but so too is the clansman of the same period. The connectors on my clansman audio devices(as well as early Southcom) look identical. But as Tom says, the index pins are different.
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Dennis Starks Military-Radio-Guy KB?SFP HFpack/Milpack/MMRCG Monitor all: 3996usb, 5357usb, 7296usb, 14342.5usb, 18157.5usb, 29.4fm, 51.0fm MMRCG.org On Saturday, June 27, 2020, 12:25:57 PM CDT, Stuart Mckinnon via groups.io <stuartjmckinnon@...> wrote:
What about the extra pin on Clansman Tom, I thought the period of racal kit he is looking at was 6 pin? Stuart G0TBI -----Original Message----- From: Tom B <tbryan@...> To: [email protected] Sent: Sat, 27 Jun 2020 16:27 Subject: Re: [RacalRadio] TRA 921 Speaker Pic The connectors are fairly easy to come by.? Clansman connectors will work, but the keying may be different.? You may have to grind off a key or two to get it to fit.? Do not force the connector on if it doesn't look like all the keys line up. Tom On 6/27/2020 11:16 AM, KL7AM wrote: Are those Speaker/Mic connectors available? Can anyone tell me where if so and what they are? |
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Re: TRA 921 Speaker Pic
What about the extra pin on Clansman Tom, I thought the period of racal kit he is looking at was 6 pin?
Stuart
G0TBI
-----Original Message-----
From: Tom B <tbryan@...> To: [email protected] Sent: Sat, 27 Jun 2020 16:27 Subject: Re: [RacalRadio] TRA 921 Speaker Pic The connectors are fairly easy to come by.? Clansman connectors will
work, but the keying may be different.? You may have to grind off a key or two to get it to fit.? Do not force the connector on if it doesn't look like all the keys line up. Tom On 6/27/2020 11:16 AM, KL7AM wrote: > Are those Speaker/Mic connectors available? Can anyone tell me where if so and what they are? > Not a connector/Plug I have although I do have quite a few... > > KL7AM > > ----- Original Message ----- > From: "KB0SFP via groups.io" <spike.dennis=[email protected]> > To: "RacalRadio" <[email protected]> > Sent: Saturday, June 27, 2020 7:07:14 AM > Subject: Re: [RacalRadio] TRA 921 Speaker Pic > > The thing you see that looks like a pilot light is?Desiccant. > > Dennis Starks > Military-Radio-Guy > KB?SFP > HFpack/Milpack/MMRCG > Monitor all: 3996usb, 5357usb, 7296usb, 14342.5usb, 18157.5usb, 29.4fm, 51.0fm > MMRCG.org > > > > > > |
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Re: TRA 921 Speaker Pic
The best and cheapest place for brand new military connectors (or indeed any other type of connector), is Servo and Electronic Supplies in Lydd, Kent.
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I have known this company since 1965 when I first met the former owner Arthur Egan, now deceased. Arthur started buying up surplus military electronics after the war (1947), and specialised in Synchros, Servos and Connectors. His son Rob took over the company a few years back, and Servo have two levels of stock. 1) Certified, brand new, fully traceable stock, at prices that for most Radio Amateurs are eye-watering. 2) Brand new, uncertified, stock that has no traceability. This stock is much, much cheaper, but comes in the manufacturer¡¯s sealed bag. However one absolutely MUST give the full part number of what you are looking for. Call: 01797-322500 A lady called Sam handles the uncertified stock. She will not tolerate time-wasters and will probably ask for you to email her, so that she can quote you a price and delivery. If in doubt about the part number, she will accept a photo of the part (or it¡¯s mating half), and do her best to help. Servo still have R1155/T1154 Jones Plugs in stock as well as most WW2 era connectors - all brand new, old stock. Julian Barnard. On 27 Jun 2020, at 16:56, Tom B <tbryan@...> wrote: |
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Re: TRA 921 Speaker Pic
The black stripe on the microphone inset indicates it is a carbon granule type.
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Andy G8JAC I think this is the correct handset. Tom |
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Re: TRA 921 Speaker Pic
I think this is the correct handset.
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Tom On 6/27/2020 11:27 AM, Tom B wrote:
The connectors are fairly easy to come by.? Clansman connectors will work, but the keying may be different.? You may have to grind off a key or two to get it to fit.? Do not force the connector on if it doesn't look like all the keys line up. |
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Re: TRA 921 Speaker Pic
The connectors are fairly easy to come by.? Clansman connectors will work, but the keying may be different.? You may have to grind off a key or two to get it to fit.? Do not force the connector on if it doesn't look like all the keys line up.
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Tom On 6/27/2020 11:16 AM, KL7AM wrote:
Are those Speaker/Mic connectors available? Can anyone tell me where if so and what they are? |
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