Re: TRA931 - transmitter PA transistors 2N5070
Hello All !
I do have some extra 2N5070 RCA ; contact me off list
73'
Jack XT2AA
feyssacj(at)wanadoo.fr
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does someone know where to get a (matched) pair of the 2N5070 (Racal No. 711356) or a substitute, please?
Thank you and
73s,
Peter, DC6BN
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thanks for your help..i found the site and will order up a
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--- On Fri, 4/9/10, Dennis wrote:
Dennis
thanks for your help..i will order up a matched set or two..
Now are you getting the strength?your supposed to get on your signal?
Dave
KG4LQT
From: Dennis
Subject: Re: [Racal-manpacks] ebay 2N5070s
To: Racal-manpacks@...
Date: Friday, April 9, 2010, 4:03 PM
Yep, but they are $35ea in singles only(no matched pairs). The MRF401 is $45 for a matched pair.
? Dennis Starks Military-Radio-Guy KB0SFP Monitor(all USB): 3996, 5403.5, 7296, 14342.5, 18157.5
From: George Scott
To: Racal-manpacks@...
Sent: Fri, April 9, 2010 2:42:40 PM
Subject: [Racal-manpacks] 2N5070s
?
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Hi all, cant remember who originally wanted some but have a look at ebay item no 380040365648
regards
george m1fne
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Thanks, Dennis, for your valuable information -
will consider that!
73 de Peter, DC6BN
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Good evening, George,
it was me...
Many thanks for the information!
73, Peter, DC6BN
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Yep, but they are $35ea in singles only(no matched pairs). The MRF401 is $45 for a matched pair. ? Dennis Starks Military-Radio-Guy KB0SFP Monitor(all USB): 3996, 5403.5, 7296, 14342.5, 18157.5
From: George Scott
To:
Racal-manpacks@...
Sent: Fri, April 9, 2010 2:42:40 PM
Subject: [Racal-manpacks] 2N5070s
?
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Hi all, cant remember who originally wanted some but have a look at ebay item no 380040365648
regards
george m1fne
?
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Hi all, cant remember who originally wanted some but have a look at ebay item no 380040365648
regards
george m1fne
?
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Re: TRA931 - transmitter PA transistors 2N5070
Dennis
MRF-401? You say these are good final transistors for my 921? ok..i will try to find them.. are they readily available??My radio uses a matched set? It would be the answer to a prayer! I will hunt them down unless you hae a source already.
thanks dave
KG4LQT
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--- On Fri, 4/9/10, david ludlow wrote:
From: david ludlow
Subject: Re: [Racal-manpacks] TRA931 - transmitter PA transistors 2N5070
To: Racal-manpacks@...
Date: Friday, April 9, 2010, 2:42 PM
?
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hi dennis..
Are the transistors your looking for the finals transistors? If you have ant luck please let me know too.? I have a racal 921 and need a source for good finals too.? i have sent out several emails to no luck.? Im using some commercial transmitter finals now aN elmer put in ?but im pretty dissatisfied.?
good luck To you
dave
KG4LQT
--- On Thu, 4/8/10, Dennis wrote:
From: Dennis
Subject: Re: [Racal-manpacks] TRA931 - transmitter PA transistors 2N5070
To: Racal-manpacks@ yahoogroups. com
Date: Thursday, April 8, 2010, 12:01 PM
?
Use MRF-401. It will actually work a little better than the originals. Available from:
? Dennis Starks Military-Radio- Guy KB0SFP Monitor(all USB): 3996, 5403.5, 7296, 14342.5, 18157.5
From: Peter
To: Racal-manpacks@ yahoogroups. com
Sent: Thu, April 8, 2010 8:44:48 AM
Subject: [Racal-manpacks] TRA931 - transmitter PA transistors 2N5070
?
Hello all,
does someone know where to get a (matched) pair of the 2N5070 (Racal No. 711356) or a substitute, please?
Thank you and
73s,
Peter, DC6BN
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Re: TRA931 - transmitter PA transistors 2N5070
?
Are the transistors your looking for the finals transistors?
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Yes. the 2N5070 are the RF/PA trans used in the Racal Syncal 30(TRA931) & others.
?If you have ant luck please let me know too.
----------------
I thought I did.
The MRF-401 though bot exactly the same package as the 2n5070 it can easily be fit in the space provided & it works very well.
Again, they can be purchased very reasonably in matched pairs from:
? Dennis Starks Military-Radio- Guy KB0SFP Monitor(all USB): 3996, 5403.5, 7296, 14342.5, 18157.5
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Re: TRA931 - transmitter PA transistors 2N5070
hi dennis..
Are the transistors your looking for the finals transistors? If you have ant luck please let me know too.? I have a racal 921 and need a source for good finals too.? i have sent out several emails to no luck.? Im using some commercial transmitter finals now aN elmer put in ?but im pretty dissatisfied.?
good luck To you
dave
KG4LQT
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--- On Thu, 4/8/10, Dennis wrote:
From: Dennis
Subject: Re: [Racal-manpacks] TRA931 - transmitter PA transistors 2N5070
To: Racal-manpacks@...
Date: Thursday, April 8, 2010, 12:01 PM
?
Use MRF-401. It will actually work a little better than the originals. Available from:
? Dennis Starks Military-Radio- Guy KB0SFP Monitor(all USB): 3996, 5403.5, 7296, 14342.5, 18157.5
From: Peter
To: Racal-manpacks@ yahoogroups. com
Sent: Thu, April 8, 2010 8:44:48 AM
Subject: [Racal-manpacks] TRA931 - transmitter PA transistors 2N5070
?
Hello all,
does someone know where to get a (matched) pair of the 2N5070 (Racal No. 711356) or a substitute, please?
Thank you and
73s,
Peter, DC6BN
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Re: TRA931 - transmitter PA transistors 2N5070
?
Many thanks, Dennis, will do.
Best rgds.,
Peter, DC6BN
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Re: TRA931 - transmitter PA transistors 2N5070
Use MRF-401. It will actually work a little better than the originals. Available from: ? Dennis Starks Military-Radio-Guy KB0SFP Monitor(all USB): 3996, 5403.5, 7296, 14342.5, 18157.5
From: Peter
To: Racal-manpacks@...
Sent: Thu, April 8, 2010 8:44:48 AM
Subject: [Racal-manpacks] TRA931 - transmitter PA transistors 2N5070
?
Hello all,
does someone know where to get a (matched) pair of the 2N5070 (Racal No. 711356) or a substitute, please?
Thank you and
73s,
Peter, DC6BN
|
TRA931 - transmitter PA transistors 2N5070
Hello all,
does someone know where to get a (matched) pair of the 2N5070 (Racal No. 711356) or a substitute, please?
Thank you and
73s,
Peter, DC6BN
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Norfolk radio amateur could make world record
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Release of book "Milspec radio equipment, Vol2"
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Hi,
Does anyone have a power switch for a 931P? This is the 3-position rotary switch (Off, Low Power, High Power). A friend has a radio with this switch missing and is looking for one.
Any help/info appreciated,
Thanks,
Peter
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Re: Yeoman Racal TRA 3910
In a message dated 08/04/2010 12:11:42 GMT Daylight Time,
martin-smyth@... writes:
?
Hello,
Does anyone have any User manuals or notes on the Yeoman
Racal TRA 3910
please.
Regards,
Martin
M0MGA
Martin
?
You will probably get a negative answer on this one, as most were produced
as trials kit at Racal Salisbury, so I am lead to believe, and even the guys
formerly at Racal Reading and subsequently at Thales Crawley, have no knowledge
of any instruction/maintenance manuals for the 3900 series of radios (VHF and
HF), this of course Racal's offering for the Bowman contract?? The offering was
called Yeoman.
?
I wish you luck, the only hope we have is to track down the original
designer/design team, they may still have notes, those on hear who are Ex Racal
please get back to us, you know who you are, reply direct if you don't wish to
go public, hope all is well in Marlow!
?
This from Pre Bowman days, clipped from the web:
In the UK, Racal is bidding with Siemens Plessey Systems as the Yeoman team
for the British Army's next generation communications requirements. Project
BOWMAN will provide a state-of-the-art voice and data network with encrypted,
ruggedised and electronic warfare-resistant communications. Racal will provide
all VHF/HF radio communications for Bowman, based on the Jaguar, which is the
world's most widely used tactical radio, and developed from its second
generation radio, Panther. Siemens Plessey Systems will be responsible for the
management information systems and overall system design.
?
?
?
Cheers
?
Stuart
G0TBI
?
BTW I am still looking for a TA 4793 Amp, one guy came
back to me a few weeks ago, and then nothing
afterwards!!!
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Hello,
Does anyone have any User manuals or notes on the Yeoman Racal TRA 3910 please.
Regards,
Martin
M0MGA
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Hi all please see my clansman bits on ebay
G7JWR
G7jwr@...
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Pete:
?
I have modified two TRA-921's to work on 60M.?
This is not a clarifier, but it is very simple to do.? The MHz knob on the
radio selects a crystal oscillator for each 1 MHz band from 2 to 7 MHz.?
The PLL synthesizer does the 100 KHz, 10 KHz and 1 KHz selection.? I simply
found the crystal for the 5 MHz band and put a 12 pf capacitor in parallel with
it.? You may have to "tweak" this value a bit to get it just right.? I
did this by selecting the capacitor from several on hand.? This offsets the
entire 5 MHz band down 500 Hz, but it will take you less than 15 minutes to put
the mod in the radio.? This mod?will require you to tune to the next
higher 1 KHz position on the dial, while on 60M.
?
I thought about replacing the desiccator with a pot
and put a?varicap diode?on the reference oscillator,?but I have
not got around to it yet.? This would reduce the frequency stability a
bit.? It is very good now.
?
This radio also have very good true AM modulation
and?a true AM detector along with a good AM IF filter.??For those
who?check into any of the military?radio AM nets, it is?better
than most packsets.
?
Good luck,
?
Jim Butch
wb8cdx
?
?
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TR-38D transceiver service manual
Hi group:
I would like some help to find schematics or service manual for old transceiver? Racal TR-38D. I think it was manufactured in South Africa ! Thanks a lot.
??????????????????????????????? From Roland, a real Racal lover.
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Martin_Smyth