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Re: Racal PSU MA4178
Keith Watkins
All fixed,well will be when I get 2N3772's.
I replaced an S/c one.But another was leaky when in circuit.Measured fine with diode test etc.Cheap enough to replace the lot in view that it's a decent supply.Keith. --- In Racal-manpacks@..., "Keith Watkins" <liner21@...> wrote: but no lower.Yes might do as you say,use an IC to drive the transistorsdrive the existing transistors?_____________________________________________________________________Rgds40yahoogroups.com> , "Keith Watkins" <liner21@> businessThis message has been checked for all known viruses by theMessageLabs Virus Control Centre. For further information visitto be confidential and may be legally privileged. Access to and use purposes. If you have received this message by mistake, pleasenotify the sender immediately, delete it and do not copy it to anyoneelse. Thurrock Council cannot accept any responsibility for the accuracyor completeness of this message as it has been transmitted over apublic network.and do not necessarily reflect the opinions of Thurrock Council.but please rely on your own virus checker and procedures.UK Data Protection and Freedom of Information legislation thesecontents may have to be disclosed in response to a request.____________________________________________________________________Thurrock Council's corporate e-mail system and may be subject to This message has been checked for all known viruses by theMessageLabs Virus Control Centre. For further information visit |
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TRA-906 Information required
Hi there, John in Bristol here; I've had a couple of 906's for some
time now and would like to get them operational on the ham bands. I've had a look at the circuit and looks simple enough with just an xtal change required. I would like to know if anyone has any details or schematics or any other info about these transceivers? I perticularly need to know if the Cathodeon L/C? filters will go below 2MHz as I'd like to do top band. Regards John. |
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Re: Racal PSU MA4178
Keith Watkins
Thanks Alan,It did have a duff pass transistor & this was replaced.
Voltage starts off at 20 & very slowly rises to 33v.Is adjustable but no lower.Yes might do as you say,use an IC to drive the transistors prior to the 2n3055 on the reg board.317 or something like it.Keith. --- In Racal-manpacks@..., "Belton, Alan" <ABelton@...> wrote: innards to the one referred to? I've had a couple off Gordon, just the thing for the high powered stuff, well worth the money. It's worth checking the main pass transistors, to see what the pcb is feeding the base, as when they do fail, they tend to take the whole lot with them? If the pass transistors are OK, but the pcb duff, I've prevously got it going by using a separate reg psu pcb to drive the existing transistors? Rgds40yahoogroups.com> , "Keith Watkins" <liner21@> wrote:_____________________________________________________________________Well chaps still no joy finding a diagram but did speak to Gordon This message has been checked for all known viruses by theMessageLabs Virus Control Centre. For further information visit to be confidential and may be legally privileged. Access to and use of its content by anyone else other than the addressee(s) may be unlawful and will not be recognised by Thurrock Council for business purposes. If you have received this message by mistake, please notify the sender immediately, delete it and do not copy it to anyone else. Thurrock Council cannot accept any responsibility for the accuracy or completeness of this message as it has been transmitted over a public network. do not necessarily reflect the opinions of Thurrock Council. please rely on your own virus checker and procedures. Data Protection and Freedom of Information legislation these contents may have to be disclosed in response to a request. Thurrock Council's corporate e-mail system and may be subject to scrutiny by someone other than the addressee. ____________________________________________________________________MessageLabs Virus Control Centre. For further information visit |
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Re: Racal PSU MA4178
Belton, Alan
These are the MA 4085 or MA935 psu's I think, which have similar innards to the one referred to? I've had a couple off Gordon, just the thing for the high powered stuff, well worth the money. It's worth checking the main pass transistors, to see what the pcb is feeding the base, as when they do fail, they tend to take the whole lot with them? If the pass transistors are OK, but the pcb duff, I've prevously got it going by using a separate reg psu pcb to drive the existing transistors?
Rgds Al ________________________________ From: Racal-manpacks@... on behalf of Keith Watkins Sent: Sun 14/01/2007 16:12 To: Racal-manpacks@... Subject: [Racal-manpacks] Re: Racal PSU MA4178 --- In Racal-manpacks@... <mailto:Racal-manpacks%40yahoogroups.com> , "Keith Watkins" <liner21@...> wrote: Well chaps still no joy finding a diagram but did speak to Gordon Sowden re same & he said he had some of the same PSU's at ?50. Sounds cheap to me. Still would like to fix this one. Thanks again.Keith. _____________________________________________________________________ This message has been checked for all known viruses by the MessageLabs Virus Control Centre. For further information visit The information in this e-mail and any attachment(s) are intended to be confidential and may be legally privileged. Access to and use of its content by anyone else other than the addressee(s) may be unlawful and will not be recognised by Thurrock Council for business purposes. If you have received this message by mistake, please notify the sender immediately, delete it and do not copy it to anyone else. Thurrock Council cannot accept any responsibility for the accuracy or completeness of this message as it has been transmitted over a public network. Any opinions expressed in this document are those of the author and do not necessarily reflect the opinions of Thurrock Council. Any attachment(s) to this message has been checked for viruses, but please rely on your own virus checker and procedures. Senders and recipients of e-mail should be aware that under the UK Data Protection and Freedom of Information legislation these contents may have to be disclosed in response to a request. All e-mail sent to or from this address will be processed by Thurrock Council's corporate e-mail system and may be subject to scrutiny by someone other than the addressee. ____________________________________________________________________ This message has been checked for all known viruses by the MessageLabs Virus Control Centre. For further information visit |
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Re: Racal PSU MA4178
Keith Watkins
--- In Racal-manpacks@..., "Keith Watkins" <liner21@...>
wrote: Well chaps still no joy finding a diagram but did speak to Gordon Sowden re same & he said he had some of the same PSU's at ?50. Sounds cheap to me. Still would like to fix this one. Thanks again.Keith. |
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Power supply
g3psz1961
I have a multi range 100 amp commercial switch mode psu unit which i
bought on ebay for ?50 sometime ago. Dispite every trick in the book I have never been able to suppress the hash up to about 35 mcs where it dissappears. Excellent unit for service work and running some VHF gear.It was produced for comms work not computors. |
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Racal MA 4178 PSU
¿ªÔÆÌåÓýHi Group
?
FOR SALE Large Racal PSU, MA 4178, 240/110 volts AC supply, 28volts @ 35Amps output via standard 4 way DC socket ?120, used to power Syncal and other 24/28v supplied sets, two of these, are normally used to power the 4156 400watt set up, I may have another available also at ?120 Buyer collects, West Midlands, or could deliver to stoneleigh Cheers Stuart Any queries Tel:07860496516 |
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Re: [armyradios] Changing ISP and Email
Patricia \(Elaine\) Gibbons
¿ªÔÆÌåÓý?
The?best?solution?is?to?set?your?OLD?email?address?to?web-only/no?mail,?then?subscribe?with?your?NEW
email address .. when everything is found to be working
okay, simply set your account preference to
your
NEW email address..
?
All these
steps should be done via the webpage, and not via email ..
?
Trish
?
?
From: armyradios@... [mailto:armyradios@...] On Behalf Of Paul Gilmore Sent: Saturday, January 06, 2007 2:11 PM To: clansman_larkspur@...; Original WS#19set; Wireless-Set-No19@...; hml@...; armyradios@...; Milsurplus@...; Racal-manpacks@...; taborsoft Subject: [armyradios] Changing ISP and Email
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Re: Looking for Clansman
Andre
toggle quoted message
Show quoted text
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Re: TRA-967
Ron Price
¿ªÔÆÌåÓýMany thanks for that Al.
?
Unfortunately the SLA is too close a fit to do as
you suggest so I will have a go at making a clip to attach it.
?
I am still confused by the audio sockets
though!
On my 967 socket 1 has seven pins and socket 2 has
six.
My handset with a six pin plug works in
both.
Clansman type seven pin plugs do not fit as I have
tried the ones from my RT320 but I do not have a Larkspur type to
try.
?
Does anyone know the type I need to look
for?
?
Best wishes,
?
Ron, GW4EVX
?
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TRA931 - open to offers
I have a 931 gathering dust. If anybody would like to make me an
offer for it you can either collect it from Ipswich or I can post at your cost. This is not a fully working device .... it has no PA or ATU and the frequency switches have been doctored to allow them to rotate continuously. The luminous stip behind the switch bezels is also missing. When last tested the receiver worked OK and it generated a few hundred mW of SSB on transmit into 50 ohms. Useful for spares, or for what I used it for many years ago - to drive a VHF transvertor. It was acquired quite legitimately as scrap in the 1980s. Has case, but probably not all the fixing screws and an original handset. No battery or power supply (it needs a minimim of 18V to fire up). Further enquiries and/or offers best direct to g4cxt@... rather than via this group. 73 Malcolm |
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Re: TRA-967
Belton, Alan
Ron,
Depending on the physical size of the 2.8Ah battery, it might be an option to obtain a dry battery case for the 967 (they still turn up on eBay, new in original packing from time to time, not that expensive), and remove the internal dividers and other bits, then slide the new battery into the case if it'll fit? (With a fast blow fuse in the supply from it, as it would wreak havoc inside the rig if there were a short circuit) I'm not sure if your 967 has the older 6 pin Larkspur socket, or the later 7 pin Clansman type? (Mine is 7 pin, but I've seen 6 as well). If its the 7 pin version, one pin is often connected to the switched supply rail, to power ancilleries from the rig, etc My EMER type info locally gives the following connections, but do thoroughly check first on your rig to make sure: Larkspur 6 pin socket A Microphone live or inner B Microphone shield or outer C PTT D PTT and Headphone earth E No connection (usually!) F Headphones/AF output Clansman, etc, 7 pin socket A Microphone live or inner B Microphone outer (can be isolated for balanced mic inputs) C Switched +ve supply to/from battery (may be via blocking diode) D Headphones/AF output E Earth/chassis F PTT G Headphones/AF output, commoned to D on most rigs, but can feed earpieces separately on harness systems Various rigs do various things with the transmit and receive audio, including the use of balanced mic inputs, and bi-aural headphone outputs, hence the strapped audio lines on most Clansman or later kit Loads of 7 pin audio plugs/headset leads on eBay, stripped off headsets, etc, as well as new 7 pin plugs if you want to wire your own. 6 pin plugs a bit harder to find, probably easier to find an old Larkspur mic or headset and strip the lead off it, again eBay often have this sort of thing very cheaply. Watch out for headsets wired with copper "tinsel" felxible wiring, as they won't take any current, if you try feeding the 967 on tx via it. Best of luck, and Happy New Year Rgds Al G8LIT ________________________________ From: Racal-manpacks@... on behalf of Ron Price Sent: Sun 31/12/2006 13:06 To: Racal-manpacks@... Subject: Re: [Racal-manpacks] TRA-967 Nice to hear from you Al and I hope you get those cobwebs dusted off the rig and get it back on the air! Perhaps you or other members of the group can help me with the next stage of the project. I am currently using the Racal battery case with 10 C NimH cells for portable work but I would like to use a SLA as a back-up supply. I have a small SLA of 2.8Ah capacity which is almost the same size as the Racal battery case and has the correct orientation of the terminals. All I need to do is fabricate a suitable attachment system to the '967. An easier solution though would be to feed the supply voltage via the audio socket, so does anyone know of a source for the audio plug or a ready made DC lead? Many thanks and best wishes to all for 2007. Ron, GW4EVX ----- Original Message ----- From: Belton, Alan <mailto:ABelton@...> To: Racal-manpacks@... <mailto:Racal-manpacks@...> ; Racal-manpacks@... <mailto:Racal-manpacks@...> Sent: Tuesday, December 26, 2006 10:32 AM Subject: RE: [Racal-manpacks] TRA-967 Ron, Glad you got your TRA 967 going /P: I have'nt used mine for years now, will have to dig it out, as it certainly works very well, sensitive rx, and (in my case) about 2W output. The whip that came with mine peaked at about 47MHz, and was'nt very good on 4m, so I used a ground-spike whip with mine. Christmas greetings, Rgds Al G8LIT ________________________________ From: Racal-manpacks@... <mailto:Racal-manpacks@...> on behalf of Ron Price Sent: Wed 20/12/2006 21:04 To: Racal-manpacks@... <mailto:Racal-manpacks@...> Subject: [Racal-manpacks] TRA-967 Hi All, Thanks to the info received from Dan AC6AO and the loan of a manual from Bill G3TRX my TRA-967 is now fully operational (minus the 150Hz pilot tone!). I don't presently have a 4m antenna at the home station so I went to a local high spot (IO83JF, 270m asl) and operated from the car using a 5/8 whip. As I suspected the deviation is probably a touch too high but generally the reports on the audio were good. Had three contacts in half an hour, the best 'dx' being 114km, not bad going for 3W! When the wx warms up a bit I will do some more trials backpacking up the Clwydian Hills and see how the 1metre whip works out on 4m and 6m. Will keep you posted. Best wishes, Ron, GW4EVX (usually /P!) _____________________________________________________________________ This message has been checked for all known viruses by the MessageLabs Virus Control Centre. For further information visit The information in this e-mail and any attachment(s) are intended to be confidential and may be legally privileged. Access to and use of its content by anyone else other than the addressee(s) may be unlawful and will not be recognised by Thurrock Council for business purposes. If you have received this message by mistake, please notify the sender immediately, delete it and do not copy it to anyone else. Thurrock Council cannot accept any responsibility for the accuracy or completeness of this message as it has been transmitted over a public network. Any opinions expressed in this document are those of the author and do not necessarily reflect the opinions of Thurrock Council. Any attachment(s) to this message has been checked for viruses, but please rely on your own virus checker and procedures. Senders and recipients of e-mail should be aware that under the UK Data Protection and Freedom of Information legislation these contents may have to be disclosed in response to a request. All e-mail sent to or from this address will be processed by Thurrock Council's corporate e-mail system and may be subject to scrutiny by someone other than the addressee. ____________________________________________________________________ This message has been checked for all known viruses by the MessageLabs Virus Control Centre. For further information visit _____________________________________________________________________ This message has been checked for all known viruses by the MessageLabs Virus Control Centre. For further information visit The information in this e-mail and any attachment(s) are intended to be confidential and may be legally privileged. Access to and use of its content by anyone else other than the addressee(s) may be unlawful and will not be recognised by Thurrock Council for business purposes. If you have received this message by mistake, please notify the sender immediately, delete it and do not copy it to anyone else. Thurrock Council cannot accept any responsibility for the accuracy or completeness of this message as it has been transmitted over a public network. Any opinions expressed in this document are those of the author and do not necessarily reflect the opinions of Thurrock Council. Any attachment(s) to this message has been checked for viruses, but please rely on your own virus checker and procedures. Senders and recipients of e-mail should be aware that under the UK Data Protection and Freedom of Information legislation these contents may have to be disclosed in response to a request. All e-mail sent to or from this address will be processed by Thurrock Council's corporate e-mail system and may be subject to scrutiny by someone other than the addressee. ____________________________________________________________________ This message has been checked for all known viruses by the MessageLabs Virus Control Centre. For further information visit |
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Re: TRA-967
Ron Price
¿ªÔÆÌåÓýNice to hear from you Al and I hope you get those
cobwebs dusted off the rig and get it back on the air!
?
Perhaps you or other members of the group can help
me with the next stage of the project.
I am currently using the Racal battery case with 10
C NimH cells for portable work but I would like to use a SLA as a back-up
supply.
?
I have a small SLA of 2.8Ah capacity which is
almost the same size as the Racal battery case and has the correct orientation
of the terminals.
All I need to do is fabricate a suitable attachment
system to the '967.
?
An easier solution though would be?to feed the
supply voltage via the audio socket, so does anyone know of a source for the
audio plug or a ready made DC lead?
?
Many thanks and best wishes to all for
2007.
?
Ron, GW4EVX
?
?
?
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Re: TRA-967
Belton, Alan
¿ªÔÆÌåÓýRon,
Glad you got your TRA 967 going /P:? I
have'nt used mine for years now, will have to dig it out, as it certainly works
very well, sensitive rx, and (in my case) about 2W output.? The whip that
came with mine peaked at about 47MHz, and was'nt very good on 4m, so I used a
ground-spike whip with mine.
Christmas greetings,
Rgds
Al
G8LIT From: Racal-manpacks@... on behalf of Ron Price Sent: Wed 20/12/2006 21:04 To: Racal-manpacks@... Subject: [Racal-manpacks] TRA-967 Hi All, _____________________________________________________________________ This message has been checked for all known viruses by the MessageLabs Virus Control Centre. For further information visit http://www.messagelabs.com/stats.asp The information in this e-mail and any attachment(s) are intended to be confidential and may be legally privileged. Access to and use of its content by anyone else other than the addressee(s) may be unlawful and will not be recognised by Thurrock Council for business purposes. If you have received this message by mistake, please notify the sender immediately, delete it and do not copy it to anyone else. Thurrock Council cannot accept any responsibility for the accuracy or completeness of this message as it has been transmitted over a public network. Any opinions expressed in this document are those of the author and do not necessarily reflect the opinions of Thurrock Council. Any attachment(s) to this message has been checked for viruses, but please rely on your own virus checker and procedures. Senders and recipients of e-mail should be aware that under the UK Data Protection and Freedom of Information legislation these contents may have to be disclosed in response to a request. All e-mail sent to or from this address will be processed by Thurrock Council's corporate e-mail system and may be subject to scrutiny by someone other than the addressee. ____________________________________________________________________ This message has been checked for all known viruses by the MessageLabs Virus Control Centre. For further information visit http://www.messagelabs.com/stats.asp |
J Stretch