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How to limit the operational frequency of Syncal 30
James Puah
开云体育Dear Syncal 30 users/lovers, ? I am trying to ‘demil’ a Syncal 30 to operate within Ham bands.? Am toying with the idea of connecting a bandpass filter with selectable bandpass filters within the various hambands to the BNC connector.? Any concerns on this approach and if so, what other methods are feasible and how to implement them.? I am looking at simple and graceful way to do this without damaging the finals. ? James Puah? 9V1JP |
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Re: FS : PRC-77 PARTS FOR SALE
--- On Mon, 10/11/10, anthony wrote:
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Re: Comcal
pa3esa
Hello Stuart,
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Depending on which version Comcal I expect. I have a TRA-932 Comcal-30 and this set is using the same battery as the syncal-30 and is 24 volt. Im looking for the schematics of the TRA-932 Comcal-30 do you know where they can be found? Nico - PA3ESA --- In Racal-manpacks@..., Stuartjmckinnon@... wrote:
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FS : PRC-77 PARTS FOR SALE
Thank you for welcoming me as your newest member
FYI - i have plenty of PRC-77 parts and modules NOS condition for sale our firm used to supply military parts back in the 60's and through out the 80's. these are just the over supplies and are in never used condition. will ship via EMS These are the parts available : MODULE A11A , A16A , A17A , A18A , A21A , A23 , A31 , A32 , A33 , A34 , A35A , A36 , A37 , A38 , A39A , A40A , A43 , A44A , A45A , A50 , A54A , A55 RELAY K1 - 447566 , K2 - 447566 , K3 - 447085 BLADE ANTENNA AT892 WHIP ANTENNA AT271A HANDSET H189 CAPSULE MICROPHONE CAPSULE EARPHONE warm regards anthony |
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Re: Comcal
开云体育Well i operate comcal 30 with 24 volts and its ok
with the proper output IE: 5watts low and 20watts high never tried it at 18
volts tony swan M0EUY
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Re: Comcal
开云体育In a message dated 11/10/2010 13:09:35 GMT Daylight Time,
desktop@... writes:
Could anyone let me know the operating voltage for this manpack. It is either 18 or 24 volts i know. Info is very sparse for this kit Thankyou -----------------------
?
Yes, oddly its an 18v set, used three 6v batteries in series.
?
cheers, Ben. G4BXD. |
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Re: TRA-921 service manual FAULTY PDF SCAN.
Michael Buckley
开云体育Thanks Dave, and interesting!That was also true of two other documents from the same site, which had the same problems. I just wondered if it is a ploy to generate business for a high priced CD?? Mind you I havent seen the highg priced CD! Mike On 11/10/2010 03:40, davidclong wrote: ? |
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TRA-921 service manual FAULTY PDF SCAN.
davidclong
It appears that there is a unique internet era problem:
At one time some kind soul scanned the service manual for the TRA-921 manpack. This pdf scan may be seen on PA3ECT's websight. The PDF file that was generated is not quiet complete ,or good enough to actually use to fix a broken TRA-921. The text of the manual is fine. The schematics as scaned are not of quite high enough resolution, or complete,there about 5 pages of block digrams and schematics missing. The resolution is just short of being good enough to actually use... is that a 3?,or a 5? or a 6?,or an 8?.The magnifing glass does not quite get you there. Once everyone can see that a manual has been scaned and converted to a PDF file NO ONE will ever bother to go to the the great amount of work to duplicate an existing scan ! even if that scan is actually not quite good enough to actually use to fix the radio. If some kind soul would sell me, or loan me an actual origional manual I will scan it at high resolution (for the schematics,block diagrams, and important circuit board component drawings.)and post it on the internet. Dave Long KB2LRI |
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Re: TRA-921
david long
开云体育Dave: (K4LQT)did you get my direct email concerning the PDF of the? TRA-921? ? Dave Long? (KB2LRI) ? To: Racal-manpacks@... From: bearsnack009@... Date: Sun, 10 Oct 2010 07:36:10 -0700 Subject: Re: [Racal-manpacks] Re: TRA-921 ? David
just happened to see your looking? thru the mail.? I have that manual for the? tra 921?as a pdf.. please reply to ?bearsnack009@...?As i wrote earlier i have the same radio and? I know it was hard to find so?i will be happy to send it to you if you want me to..but? i would prefer not to send this to group email as not everyone needs it.
your bud
Dave KG4LQT ?
From: davidclong To: Racal-manpacks@... Sent: Thu, October 7, 2010 11:27:56 AM Subject: [Racal-manpacks] Re: TRA-921 ?
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Re: TRA-921
David
just happened to see your looking? thru the mail.? I have that manual for the? tra 921?as a pdf.. please reply to ?bearsnack009@...?As i wrote earlier i have the same radio and? I know it was hard to find so?i will be happy to send it to you if you want me to..but? i would prefer not to send this to group email as not everyone needs it.
your bud
Dave KG4LQT ?
From: davidclong To: Racal-manpacks@... Sent: Thu, October 7, 2010 11:27:56 AM Subject: [Racal-manpacks] Re: TRA-921 ?
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Re: TRA-921
Michael Buckley
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Hi David |
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Re: TRA-921
Michael Buckley
开云体育Hi DavidJust by accident I noticed that there is some Racal 921 info in the 19 set yahoogroup document Try 1659 Racal-BCC 100 Watt HF SSB Station and Combat Radio Systems, Sept 1970 Royal-signals@... or via the 19 set group itself - you do have to be a member I think to get docs! Its free though. Following the instructions precisely and it works! On 09/10/2010 13:13, david ludlow wrote: ? |
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Re: TRA-921
James Puah
开云体育Hi David KG4LQP, I forgot to mention one thing.? If you do get the battery case and recell it, be sure to construct a constant current charger and rate it at 10% battery capacity.? Be sure to also monitor the battery temperature while you charge the battery to get a feel of how warm they can become.? Charge until they are warm but not too hot to the touch and then note down the duration.? This way you can minimize potential damage to the batteries.? You do not need to buy the original charger as you probably pay at least 150 bucks for one which I thinik it is not worth it. ? Hope this helps too. ? James Puah 9V1JP ? From:
Racal-manpacks@... [mailto:Racal-manpacks@...] On Behalf Of James Puah ? ? Hi David KG4LQP, ? You can find the battery box on ebay from RF Comm.? The MA988 speaker is also available from another seller (can’t recall his name) but he wants 180 bucks for it!? You can recell the battery case with the newer generation of NiMH batteries with higher capacity and smaller in size.? I think the 921 takes in 18V instead of 24V so you need around 9 cells. ? You can buy the clansman center balun from ebay (just search for clansman center balun).? You can also buy the racal dipole antenna with pre-marked length for rapid field deployment and tear down field operation, really cool gear. ? .
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Re: TRA-921
James Puah
开云体育Hi David KG4LQP, ? You can find the battery box on ebay from RF Comm.? The MA988 speaker is also available from another seller (can’t recall his name) but he wants 180 bucks for it!? You can recell the battery case with the newer generation of NiMH batteries with higher capacity and smaller in size.? I think the 921 takes in 18V instead of 24V so you need around 9 cells. ? You can buy the clansman center balun from ebay (just search for clansman center balun).? You can also buy the racal dipole antenna with pre-marked length for rapid field deployment and tear down field operation, really cool gear. ? To deploy longwire (actually functions like a Marconi whip), connect one dipole wire to the balun terminal marked “1”, adjust the length according to the 921 or the 931 manual, then hang the remaining coiled wire to the tree or antenna mask.? Then connect the other dipole wire (adjust to the same length) to the balun terminal marked “0” and then straightened and leave it on the ground. ? Whether you deploy dipole or longwire, you will need to retune when you jump from one band to another.? The tuner is a very able tuner and can tune almost anything metallic connected to the antenna terminal.? The proper way to tune is to first select an unoccupied frequency, then tune to get maximum noise, and then put the radio to low power, then select tune, tune to maximum reading on the meter, and then select high power to fine tune. ?This way you will minimize potential damage to the tuner. ? You need to be able to power the 921 with battery to really enjoy the fun from field deployment.? I am contemplating to fabricate a carrying frame out of carbon reinforced fibre to carry my 931 in camping trips, and also to get myself ready if the2012 event ever happen ; )? Currently I carry the radio with the normal army backpack from my army days, adequate but not professional. ? Hope this helps. ? James Puah? 9V1JP Serious qsos are done in prone position. ? From:
Racal-manpacks@... [mailto:Racal-manpacks@...] On Behalf Of david ludlow ? ? Hi David im? a david too! And also a 921 owner i just got new finals for it..im interested in where to find a battery box and speaker also..Did your battery?come already recelled ? im using a power suppy I?rigged up But im not able to go moble with it.? i also have the whip,long wire, and dipole, i dontr have the counterpoise.Or balen..i need a better antenna .? Do you have to adjust yout antenna for each band? or frequency you use?? Also do you use a long wire atall?? ? |
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Re: TRA-921
Hi David
im? a david too! And also a 921 owner i just got new finals for it..im interested in where to find a battery box and speaker also..Did your battery?come already recelled ? im using a power suppy I?rigged up But im not able to go moble with it.? i also have the whip,long wire, and dipole, i dontr have the counterpoise.Or balen..i need a better antenna .? Do you have to adjust yout antenna for each band? or frequency you use?? Also do you use a long wire atall??
As for me? im nestling on 80 meters since i can only do one band without ajdusting the legnth of my antenna.. i have a good tuner too.? but if i switch my band without redoing my antenna it will throw off my swr.Im cutting the wire to 75.8 ftt for the middle of the band.
take care your bud
ddave KG4LQT
? From: James Puah To: Racal-manpacks@... Sent: Fri, October 8, 2010 7:27:24 AM Subject: RE: [Racal-manpacks] Re: TRA-921 ? Congratulation to you for owning the TRA921. I have a TRA931 which I have nearly completed restoration cosmetically and nearly completed collecting its ancillaries like MA988 speaker, handset, headset and handmike, dipole antenna and counterpoise plus the plug in whip, and recelled/rebuilt battery case. |
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Re: Racal Kaynard / FRM 4750
--- On Thu, 7/10/10, Tone wrote:
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Re: TRA-921
david long
开云体育James:thanks for the note,?they are indeed nice radios,the antenna tuner is very good. ? Dave KB2LRI ? To: Racal-manpacks@... From: EKTPUAH@... Date: Fri, 8 Oct 2010 19:27:24 +0800 Subject: RE: [Racal-manpacks] Re: TRA-921 ?
Congratulation to you for owning the TRA921. I have a TRA931 which I have nearly completed restoration cosmetically and nearly completed collecting its ancillaries like MA988 speaker, handset, headset and handmike, dipole antenna and counterpoise plus the plug in whip, and recelled/rebuilt battery case. The TRA921/931 series of HF rig are versatile and flexible with the built in 1khz clarifier. The tuner can almost tune up to anything metallic substanced hooked up to them. For outdoor use, they are waterproof and you don't really need to worry about rain, exceot lightnings. This is the radio I want to have with me and my family should the 2012 event ever hit/materialise as you can take them for a swim (watermanship) and then climb to a high ground to prepare for a qso. Google around and you might also find the manual available from ebay or other sources. Hope this helps. James Puah 9V1JP Serious qsos are done in prone positions. -----Original Message----- From: davidclong Sent: Thursday, October 07, 2010 11:27 PM To: Racal-manpacks@... Subject: [Racal-manpacks] Re: TRA-921 Mike: Thanks for the info I searched the site and could not find anything on the TRA-921. Dave KB2LRI |