Hello,
I will be interested buying a racal BCC39 transceiver in europa. Please make me offer.
Best regards
Alex
|
Hi
I wonder if anyone can help I'm after information on the following.
Racal PRM4090 technical manual/user manual
Racal MA567HD Jaguar VIU Technical manual/user manual
Racal MA4073B, Has anyone got an MA4073C I'd like to try changing the firmware eprom to see if the B can be converted to a C or even a G which I think is the latest version.
Also got a Plessey PTR1430 I'm looking for info on.
Any info appreciated
Regards
Dave g1jwg
|
Re: JAMCAT internal voltage
I've just measured 8.0V on mine? (ie, on the ht pins of the IC's)
?
Handy gadget, good for?finding the local blindspots of your antenna on 4 or 6m.
?
73
?
Al
G8LIT
From: v8.landrover101
To: Racal-manpacks@...
Sent: Thu, March 25, 2010 12:38:52 AM
Subject: [Racal-manpacks] JAMCAT internal voltage
?
After repairing the regulator section and replacing a few IC's in a JAMCAT, for the sake of completeness does anyone know what the internal voltage preset should be set to?
|
After repairing the regulator section and replacing a few IC's in a JAMCAT, for the sake of completeness does anyone know what the internal voltage preset should be set to?
|
Re: PRC-351 Squelsh Adjustment??
Excellent info there chaps many thanks indeed, I've not bought an amp yet, but if i see one cheap enough I'll probably grab it & give your tip a try there Al.
I think you're spot on there re the surf units improved reception too, without a meter it is only by ear of course but it certainly improved things, as you say, less hiss etc.
i've just re-checked the output power into my dummy load & it puts out just over 5 watts on the lower freq's, but on 4 & 6 it seems a solid 4w with no surf and about 2.5w with the surf in line, so not vastly different from your findings, you lose around 1w, & I about 1.5w, you just get a watt or so more to start with you lucky devil hi hi
I tweaked the squelch, only very slightly, earlier today & it seems much improved, thanks again for that info.
Now all I need is a bit of decent weather and I can go out with the dog, backpack/portable/mobile....I'm sure I'll not get any stares!
Cheers
Gav
toggle quoted message
Show quoted text
--- In Racal-manpacks@..., alan belton <belton_alan@...> wrote:
The SURF 4w for the 351 is indeed intended as a selectivity unit, as opposed to an antenna tuner, although it does match the whips, short or long into the transmitter better than on their own.? I checked my set recently, and get 6.5w out of the 351, and slightly over 5.5w through the SURF.?
What appears to be the main benefit, is that if you check the actual radiated power from the set, with a field strength meter, there's more getting out with the SURF?? (I used an old Pye field strength meter at about 15ft away.)? The internal matching for the whip is fairly crude, and switched by the channel selectors, so at a gues the SURF makes a better job of it, as an unintentional ATU/TURF.? I very much doubt the SURF will improve audio quality, other than subjectively, as the signal will probably be stronger, and then fully quieten the receiver, cutting out the background hiss more, etc.
If you choose (wisely or unwisely) to run the 351 into the 352 amplifier, and then into the SURF, the set will work, and put out quite a good signal, although the battery will go flat a lot quicker.? The downside of this is that the amplifier is sensitive to SWR, and drops out easily , and bypasses.? You'll also need another BNC to BNC lead to plumb it all in.
I've used it by tuning the 351 through the SURF, into the whip with the amplifier off, and then switching the amplifer on, so the SURF is then pre-tuned.? The meter pings over quite hard, but it keeps going well enough, and you can then see if the amplifer cuts out with high SWR, as the meter reading will then drop back.
Although prohibited in?military use, this used to work well enough in practice, did'nt (usually) break anything, and saved deploying the GSA if it was only a short call at the halt.
Al
G8LIT
?
________________________________
From: Gerald Greatrix <gerald@...>
To: Racal-manpacks@...
Sent: Sun, March 21, 2010 10:16:48 PM
Subject: RE: [Racal-manpacks] Re: PRC-351 Squelsh Adjustment??
?
Gav/Al
?????????? My understanding of the SURF unit is that it cuts the RF power so you can use 2 351 within 3mtrs of each other. As for 352 amp YOU CAN-NOT use set whip, you need a GSA, GMM, Pineapple & so fore.
73 de Gerald G7HNM
|
Re: PRC-351 Squelsh Adjustment??
The SURF 4w for the 351 is indeed intended as a selectivity unit, as opposed to an antenna tuner, although it does match the whips, short or long into the transmitter better than on their own.? I checked my set recently, and get 6.5w out of the 351, and slightly over 5.5w through the SURF.?
?
What appears to be the main benefit, is that if you check the actual radiated power from the set, with a field strength meter, there's more getting out with the SURF?? (I used an old Pye field strength meter at about 15ft away.)? The internal matching for the whip is fairly crude, and switched by the channel selectors, so at a gues the SURF makes a better job of it, as an unintentional ATU/TURF.? I very much doubt the SURF will improve audio quality, other than subjectively, as the signal will probably be stronger, and then fully quieten the receiver, cutting out the background hiss more, etc.
?
If you choose (wisely or unwisely) to run the 351 into the 352 amplifier, and then into the SURF, the set will work, and put out quite a good signal, although the battery will go flat a lot quicker.? The downside of this is that the amplifier is sensitive to SWR, and drops out easily , and bypasses.? You'll also need another BNC to BNC lead to plumb it all in.
?
I've used it by tuning the 351 through the SURF, into the whip with the amplifier off, and then switching the amplifer on, so the SURF is then pre-tuned.? The meter pings over quite hard, but it keeps going well enough, and you can then see if the amplifer cuts out with high SWR, as the meter reading will then drop back.
?
Although prohibited in?military use, this used to work well enough in practice, did'nt (usually) break anything, and saved deploying the GSA if it was only a short call at the halt.
?
Al
?
G8LIT
?
?
From: Gerald Greatrix
To: Racal-manpacks@...
Sent: Sun, March 21, 2010 10:16:48 PM
Subject: RE: [Racal-manpacks] Re: PRC-351 Squelsh Adjustment??
?
Gav/Al
?????????? My understanding of the SURF unit is that it cuts the RF power so you can use 2 351 within 3mtrs of each other. As for 352 amp YOU CAN-NOT use set whip, you need a GSA, GMM, Pineapple & so fore.
73 de Gerald G7HNM
?
|
|
|
Re: PRC-351 Squelsh Adjustment??
Gav/Al
?????????? My understanding of the SURF unit is that it cuts the
RF power so you can use 2 351 within 3mtrs of each other. As for 352 amp YOU
CAN-NOT use set whip, you need a GSA, GMM, Pineapple & so fore.
73 de Gerald G7HNM
?
From:
Racal-manpacks@... [mailto:Racal-manpacks@...] On
Behalf Of Gavin
Sent: 21 March 2010 20:59
To: Racal-manpacks@...
Subject: [Racal-manpacks] Re: PRC-351 Squelsh Adjustment??
?
?
Funny you should mention the SURF unit, mine
came with one and to be honest i thought it'd have little use from the info i
could find unless i was close to other Clansmen operators, but as I was out
playing today I tried it out with a relatively distant station, (Rochdale, the
other side of the Pennines to me), he noticed no difference at all on my
signal, but it really improved my reception of him, it dramatically reduced the
background noise & his audio had much more punch.
However when i got home i connected my meter to it & noticed the power
dropped to only about 2 watts through the surf, but from the 351 direct it was
the usual 4 watts, is that normal?
Odd the other station didn't notice any drop in my signal though...
I gather you simply tweak the surf adjuster for maximum reading and thats about
it with the surf?
Re using the 351 on 6m, how do you get around the 351's 25khz spacing when 6m
uses 20k?
Not a prob i guess if the other station can change their step size, damn shame
we can't adjust the steps in the 351 though.
Also I wonder if you have used the 20w amp with the 351?
I read you cannot use the flexi whip with the amp but i was wondering if you
knew if you could simply connect a 4m whip to the bnc connector?
Thanks again for the info there Al, always good to speak to someone who knows
these rigs, there's not a huge amount of info out there, damn useful these
yahoo groups.
Cheers
Gav
ps. Did you know the 24v input DCCU chargers have built in step up
transformers? I was lacking in a 28v supply, connected the dccu to my variable
supply & discovered the charger kicked out a 28v charge current with only
15v input, very handy that as my main shack psu does 15.5v, result!
Although the green "Complete" led didn't light, the charge light just
got dimmer & dimmer????
--- In Racal-manpacks@...,
alan belton
>
> Gav,
> Thanks for that, glad it's not the 351, as they are'nt the most friendly
thing to have to fix when they play up.?? I get the same thing on 6m, if I
leave my set connected to an external antenna at home, as there is loads of
noise around 49MHz, from baby alarms and suchlike.?? The actual squelch
threshold is very low, something like .3uV, so it does'nt hurt having it wound
up a bit, as you can always use the "Noise" setting if the signals
are bad.
> You may find that using a SURF with it will help (this was one of the reasons
they added it shortly after producing the 351, to sharpen the front end up a
bit, as very strong nearby signals generate crud in the tuning
varicaps).?? The SURF also provides better matching, and tunes the whip,
which usually means you get a bit more power out as well.
>
> 73
>
> Al
> G8LIT
>
>
>
>
> ________________________________
> From: Gavin
> To: Racal-manpacks@...
> Sent: Sun, March 21, 2010 6:28:11 PM
> Subject: [Racal-manpacks] Re: PRC-351 Squelsh Adjustment??
>
> ??
> Many thanks for that Al, it only seems to be a problem on 4m, possibly the
background noise is a bit high around here, I took it out portable today &
it worked perfectly so i suspect it is all the crud on the band, I'll give it a
slight tweak & see how it behaves.
>
> Thanks again
> Gav
>
No virus
found in this incoming message.
Checked by AVG - www.avg.com
Version: 9.0.791 / Virus Database: 271.1.1/2759 - Release Date: 03/21/10
07:33:00
|
Re: PRC-351 Squelsh Adjustment??
Funny you should mention the SURF unit, mine came with one and to be honest i thought it'd have little use from the info i could find unless i was close to other Clansmen operators, but as I was out playing today I tried it out with a relatively distant station, (Rochdale, the other side of the Pennines to me), he noticed no difference at all on my signal, but it really improved my reception of him, it dramatically reduced the background noise & his audio had much more punch.
However when i got home i connected my meter to it & noticed the power dropped to only about 2 watts through the surf, but from the 351 direct it was the usual 4 watts, is that normal?
Odd the other station didn't notice any drop in my signal though...
I gather you simply tweak the surf adjuster for maximum reading and thats about it with the surf?
Re using the 351 on 6m, how do you get around the 351's 25khz spacing when 6m uses 20k?
Not a prob i guess if the other station can change their step size, damn shame we can't adjust the steps in the 351 though.
Also I wonder if you have used the 20w amp with the 351?
I read you cannot use the flexi whip with the amp but i was wondering if you knew if you could simply connect a 4m whip to the bnc connector?
Thanks again for the info there Al, always good to speak to someone who knows these rigs, there's not a huge amount of info out there, damn useful these yahoo groups.
Cheers
Gav
ps. Did you know the 24v input DCCU chargers have built in step up transformers? I was lacking in a 28v supply, connected the dccu to my variable supply & discovered the charger kicked out a 28v charge current with only 15v input, very handy that as my main shack psu does 15.5v, result!
Although the green "Complete" led didn't light, the charge light just got dimmer & dimmer????
toggle quoted message
Show quoted text
--- In Racal-manpacks@..., alan belton <belton_alan@...> wrote:
Gav,
Thanks for that, glad it's not the 351, as they are'nt the most friendly thing to have to fix when they play up.?? I get the same thing on 6m, if I leave my set connected to an external antenna at home, as there is loads of noise around 49MHz, from baby alarms and suchlike.?? The actual squelch threshold is very low, something like .3uV, so it does'nt hurt having it wound up a bit, as you can always use the "Noise" setting if the signals are bad.
You may find that using a SURF with it will help (this was one of the reasons they added it shortly after producing the 351, to sharpen the front end up a bit, as very strong nearby signals generate crud in the tuning varicaps).?? The SURF also provides better matching, and tunes the whip, which usually means you get a bit more power out as well.
73
Al
G8LIT
________________________________
From: Gavin <g0lgb@...>
To: Racal-manpacks@...
Sent: Sun, March 21, 2010 6:28:11 PM
Subject: [Racal-manpacks] Re: PRC-351 Squelsh Adjustment??
??
Many thanks for that Al, it only seems to be a problem on 4m, possibly the background noise is a bit high around here, I took it out portable today & it worked perfectly so i suspect it is all the crud on the band, I'll give it a slight tweak & see how it behaves.
Thanks again
Gav
|
Re: PRC-351 Squelsh Adjustment??
Gav,
Thanks for that, glad it's not the 351, as they are'nt the most friendly thing to have to fix when they play up.? I get the same thing on 6m, if I leave my set connected to an external antenna at home, as there is loads of noise around 49MHz, from baby alarms and suchlike.? The actual squelch threshold is very low, something like .3uV, so it does'nt hurt having it wound up a bit, as you can always use the "Noise" setting if the signals are bad.
You may find that using a SURF with it will help (this was one of the reasons they added it shortly after producing the 351, to sharpen the front end up a bit, as very strong nearby signals generate crud in the tuning varicaps).? The SURF also provides better matching, and tunes the whip, which usually means you get a bit more power out as well.
?
73
?
Al
G8LIT
From: Gavin
To: Racal-manpacks@...
Sent: Sun, March 21, 2010 6:28:11 PM
Subject: [Racal-manpacks] Re: PRC-351 Squelsh Adjustment??
?
Many thanks for that Al, it only seems to be a problem on 4m, possibly the background noise is a bit high around here, I took it out portable today & it worked perfectly so i suspect it is all the crud on the band, I'll give it a slight tweak & see how it behaves.
Thanks again
Gav
--- In Racal-manpacks@ yahoogroups. com, alan belton wrote:
>
> Module 9, "R2", should adjust the squelch threshold, if everything is working the way it should.
>
> Rgds
>
> Al
> G8LIT
>
>
>
>
> ____________ _________ _________ __
> From: Gavin
> To: Racal-manpacks@
yahoogroups. com
> Sent: Sat, March 20, 2010 6:14:40 PM
> Subject: [Racal-manpacks] PRC-351 Squelsh Adjustment??
>
> ??
> Hi there folks, I recently acquired a PRC-351, all seems ok with it except 90% of the time the squelch is open even in Whisper mode, can anyone tell me if there is a pot to adjust the threshold?
>
> Cheers
> Gav
>
|
Re: PRC-351 Squelsh Adjustment??
Many thanks for that Al, it only seems to be a problem on 4m, possibly the background noise is a bit high around here, I took it out portable today & it worked perfectly so i suspect it is all the crud on the band, I'll give it a slight tweak & see how it behaves.
Thanks again
Gav
toggle quoted message
Show quoted text
--- In Racal-manpacks@..., alan belton <belton_alan@...> wrote:
Module 9, "R2", should adjust the squelch threshold, if everything is working the way it should.
Rgds
Al
G8LIT
________________________________
From: Gavin <g0lgb@...>
To: Racal-manpacks@...
Sent: Sat, March 20, 2010 6:14:40 PM
Subject: [Racal-manpacks] PRC-351 Squelsh Adjustment??
??
Hi there folks, I recently acquired a PRC-351, all seems ok with it except 90% of the time the squelch is open even in Whisper mode, can anyone tell me if there is a pot to adjust the threshold?
Cheers
Gav
|
Re: PRC-351 Squelsh Adjustment??
Module 9, "R2", should adjust the squelch threshold, if everything is working the way it should.
?
Rgds
?
Al
G8LIT
From: Gavin
To: Racal-manpacks@...
Sent: Sat, March 20, 2010 6:14:40 PM
Subject: [Racal-manpacks] PRC-351 Squelsh Adjustment??
?
Hi there folks, I recently acquired a PRC-351, all seems ok with it except 90% of the time the squelch is open even in Whisper mode, can anyone tell me if there is a pot to adjust the threshold?
Cheers
Gav
|
PRC-351 Squelsh Adjustment??
Hi there folks, I recently acquired a PRC-351, all seems ok with it except 90% of the time the squelch is open even in Whisper mode, can anyone tell me if there is a pot to adjust the threshold?
Cheers
Gav
|
Hi JC
All the available info is available to VMARS members via the VMARS web site, in the form of the field repair information in EMER's
This will incluide the pin out you mention.
Surely the best way is to get the appropiate Clansman set combining box which connects via twin cable.
Mike B
m1ccf
toggle quoted message
Show quoted text
On 16/03/2010 17:45, JC wrote:
Hello Folks,
I have a BCC39B and PRC320 and the remote box (Control Radio Set
Local/remote 5820-99-117-0449) including a remote control handset.
I would like to connect it as per Fig 14 in the back of the PRC320 user
manual and remotely control the radios, this is possible with the right
cable between radio and remote control box.
Can anyone on the Racal manpack list give me the pinout/wiring info to
built the control/remote cable between the box and the radio.
thanks
JC
VE7OI
|
HI Group,
Looking for any info on the above MA4921 power interface unit. especially circuit diagram or full manual.
JEFF G8XXI.
|
Clansman charger DCCU 14V
Dear group,
I want to solve the following problem:
I have a charger DCCU 14V. It had a problem with the charging. The lights and charging went on after I shocked the unit from outside by knocking, otherwise it was off. Since yesterday it do not charge continous, only in intervalls like a sirene. In the same rythm the LED?s went on and off. What is defect? Can anyone help?
Regards
Matthias
|
Hello Folks,
I have a BCC39B and PRC320 and the remote box (Control Radio Set Local/remote 5820-99-117-0449) including a remote control handset.
I would like to connect it as per Fig 14 in the back of the PRC320 user manual and remotely control the radios, this is possible with the right cable between radio and remote control box.
Can anyone on the Racal manpack list give me the pinout/wiring info to built the control/remote cable between the box and the radio.
thanks
JC
VE7OI
|
Scoutfest at TARO Drop Zone, Ft. Stewart, GA
We will be operating radio station W4S (We're 4 Scouting) at the Taro Drop Zone at Ft. Stewart on March 20, 2010, from approximately 1200 GMT to 2359 GMT. This is the second of 4 special 100th Anniversary events for the Coastal Empire Council, BSA. We will be operating on or around the following frequencies:
3.975 LSB
3.996 USB
5.371.5 USB
5.403.5 USB
7.251 LSB
7.296 USB (day/night)
14.342.5 USB
18.157.5 USB
28.400.0 USB
Please try and drop by and help us with contacts so the Boy Scouts can talk with other hams and work on merit badges and other awards.
Thanks
Philip Neidlinger
KA4KOE
|
Hi Group
?
I have posted a pic to the photo's section of a vehicle interface unit, do
you know of one of these units needing a home, I am looking for one, please let
me know if you have any info
?
Stuart
G0TBI
|
clansman UK/prc-320 manpacks for sale
I have two prc-320 for sale left in my current batch, both are fully working and
ready to use on HF 2-30mhz ssb,am and cw.
I can also supply as a complete package if required.
1x rt320 radio tested
1x whip antenna
1x antenna goose kneck
1x heavy duty battery charged and tested
1x headset/mike
I will ship worldwide and paypal accepted
please email directly and not via the forum at g7jwr@...
i may consider px
|
Gavin