[drakelist] TR-4/L4B transmit AGC problem

2005-01-01 Thread Ron Skipper
Ron Skipper <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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Hello all,
Ron W8ACR here, I'm new to the list.  I'm running a TR-4 with an L4B amp 
and I'm having a problem with the transmit AGC action. Basic tuneup is 
no problem. However, when I try to adjust the AGC action by using a 
single tone as suggested by the manual, I find that I cannot attain 
normal levels of plate current in the amp. That is, I seem to have "too 
much" AGC. Rotation of the AGC control knob on the front panel of the 
L4B has no effect one way or the other. If I unplug the AGC cable, I am 
able to get normal levels of plate current. I have checked the pertinent 
components in the L4B and they all seem to be OK.

What values of voltage should I be measuring at the AGC cable jack? What 
other things should I check? Is this problem likely to be in the TR-4?

I'd appreciate any help.
Thanks,
Ron W8ACR
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[drakelist] R-4B and T-4XB cable question

2005-01-01 Thread ARDUJENSKI

[EMAIL PROTECTED] made an utterence to the drakelist gang
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I have a R-4B and T-4XB and it came with a set  of what looks like original 
interconnecting cables. They are all look like gray  microphone connector cable 
with RCA jacks and with tags on them that look as if  they were from the 
mfgr. I have read the INJ cable needs to be an RG-62. I was a  bit confused by 
the 
set. 

I found this  note:
http://www.mail-archive.com/drakelist@www.zerobeat.net/msg02354.html

This  note appears to say you don't need the RG-62 if the sets are aligned 
with the  other cable. Am I better off getting the RG-62 cable?

Thanks

Alan  KB7MBI  

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Re: [drakelist] Drake cables

2005-01-01 Thread KC8YY



Hi Garey,
 
Many, many thanks for the invaluable information
on Drake cables. This type information is often
almost impossible to find.
 
73,  Bob  KC8YY


Re: [drakelist] R-4B and T-4XB cable question

2005-01-01 Thread Garey Barrell
Garey Barrell <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
Alan -
Look at the INJ cable and see if it has white insulation in the 
connectors.  The originals also had a tag on ONLY the INJ cable, and did 
NOT use RG-62.

RG-62 will work, but is heavy, stiff and larger than the correct cable. 

If you have a capacitance meter of some sort available, you can check 
the capacitance of the cables and compare them with the values in the 
note you referenced.

If you align the pair (actually only the INJ trimmer adjustments) with 
the cables connecting them together you will find only slightly less 
drive available to the transmitter when running transceive with receiver 
PTO control if you use standard audio patch cable for the INJ line.

73, Garey - K4OAH
Atlanta
[EMAIL PROTECTED] wrote:
[EMAIL PROTECTED] made an utterence to the drakelist gang
--
I have a R-4B and T-4XB and it came with a set  of what looks like original 
interconnecting cables. They are all look like gray  microphone connector cable 
with RCA jacks and with tags on them that look as if  they were from the 
mfgr. I have read the INJ cable needs to be an RG-62. I was a  bit confused by the 
set. 

I found this  note:
http://www.mail-archive.com/drakelist@www.zerobeat.net/msg02354.html
This  note appears to say you don't need the RG-62 if the sets are aligned 
with the  other cable. Am I better off getting the RG-62 cable?

Thanks
Alan  KB7MBI  

 

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[drakelist] drake AC-4R replacement pcb kits

2005-01-01 Thread mike bryce

mike bryce <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
Boys and girls...

Snow's gone (for now) and it's almost spring like out. Washed and wax my
jeep, can't wait to take the top off again,  so feeling good...

that being said..

anyone wishing to get a drake AC-4R replacement pcb kit:

until Jan 7 2005

Kits are $10 off of current price of $65

more into? Sure. Point your browser to:

http://www.theheathkitshop.com/drakeac4rreplace.html

Remember, this is only good till Jan 7, 2005

Have a great new year!!
 
Mike Bryce WB8VGE
SunLight Energy Systems

http://www.seslogic.com
http://www.theheathkitshop.com

"Electricity at the speed of light"

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[drakelist] AM Filter Advice for TR-7

2005-01-01 Thread Jim DiMauro

"Jim DiMauro" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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Hi All:

I have a TR-7 that I'd like to use on AM every so often.  The trouble is
that the radio doesn't have an AM filter.  A previous owner had installed
the resistor mod that's supposed to act like an AM filter, but the result is
far too wide to be useful.  For example, if I'm listening to a QSO on 7290,
I can hear CHU on 7335.  Now that's wide!

I'm looking for recommendations on AM filters, specifically which ones
perform well.  Should I look for an original Network Sciences SL-6000 that
Drake supplied, or are the better options out there like Sherwood and Kiwa?
All input will be appreciated.

Thanx & 73,
Jim
WA2MER

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Re: [drakelist] AM Filter Advice for TR-7

2005-01-01 Thread Garey Barrell
Garey Barrell <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
Jim -
Something else is going on if you are hearing a signal that is 45 kHz away!
There is a 4-pole crystal "roofing" filter in the first IF (48 MHz) that 
is 8 kHz wide, which sets the maximum bandwidth of the receiver.  This 
is what sets the receiver b/w when the R-C network filter is installed.  
While this is not a 1.8:1 shape factor, 100 dB ultimate rejection 
filter, it certainly is going to be a long way down at 45 kHz from it's 
center frequency if everything is working normally.

Unless you are living next to CHU and listening to a QRP signal from 
Tibet, something else is wrong!  You don't have the calibrator switched 
on do you?  Or the RV-7/75 external PTO?  Is the card cage shield in 
place with ALL screws?   DO you live under the CHU tower?  :-)

73, Garey - K4OAH
Atlanta
Jim DiMauro wrote:
"Jim DiMauro" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
Hi All:
I have a TR-7 that I'd like to use on AM every so often.  The trouble is
that the radio doesn't have an AM filter.  A previous owner had installed
the resistor mod that's supposed to act like an AM filter, but the result is
far too wide to be useful.  For example, if I'm listening to a QSO on 7290,
I can hear CHU on 7335.  Now that's wide!
I'm looking for recommendations on AM filters, specifically which ones
perform well.  Should I look for an original Network Sciences SL-6000 that
Drake supplied, or are the better options out there like Sherwood and Kiwa?
All input will be appreciated.
Thanx & 73,
Jim
WA2MER
 

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RE: [drakelist] AM Filter Advice for TR-7

2005-01-01 Thread Jim DiMauro

"Jim DiMauro" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
Hi Garey:

Thanx for your thoughts.  I hadn't looked into the circuit, or else I would
have found the 8 kHz filter.  Regarding CHU, it's very, very weak, but I
shouldn't be hearing it at all.  You may have hit on the problem: the card
cage shield.  It's not very tight.  All of the screws are there, but more
than a few are stripped.  I guess it's time to tighten things up and see
what happens.  BTW, for future reference, what are your thoughts on filters?

73,
Jim
WA2MER

-Original Message-
From: Garey Barrell [mailto:[EMAIL PROTECTED]
Sent: Saturday, January 01, 2005 4:17 PM
To: [EMAIL PROTECTED]; Drakelist
Subject: Re: [drakelist] AM Filter Advice for TR-7


Jim -

Something else is going on if you are hearing a signal that is 45 kHz away!

There is a 4-pole crystal "roofing" filter in the first IF (48 MHz) that
is 8 kHz wide, which sets the maximum bandwidth of the receiver.  This
is what sets the receiver b/w when the R-C network filter is installed.
While this is not a 1.8:1 shape factor, 100 dB ultimate rejection
filter, it certainly is going to be a long way down at 45 kHz from it's
center frequency if everything is working normally.

Unless you are living next to CHU and listening to a QRP signal from
Tibet, something else is wrong!  You don't have the calibrator switched
on do you?  Or the RV-7/75 external PTO?  Is the card cage shield in
place with ALL screws?   DO you live under the CHU tower?  :-)

73, Garey - K4OAH
Atlanta


Jim DiMauro wrote:

>"Jim DiMauro" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
>--
>Hi All:
>
>I have a TR-7 that I'd like to use on AM every so often.  The trouble is
>that the radio doesn't have an AM filter.  A previous owner had installed
>the resistor mod that's supposed to act like an AM filter, but the result
is
>far too wide to be useful.  For example, if I'm listening to a QSO on 7290,
>I can hear CHU on 7335.  Now that's wide!
>
>I'm looking for recommendations on AM filters, specifically which ones
>perform well.  Should I look for an original Network Sciences SL-6000 that
>Drake supplied, or are the better options out there like Sherwood and Kiwa?
>All input will be appreciated.
>
>Thanx & 73,
>Jim
>WA2MER
>
>

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[drakelist] Signal 45KHz away

2005-01-01 Thread Mike,W8KRR
"Mike,W8KRR" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
This sounds like a spurious response from the synth - are all the 
shields and grounds good?

As far as filters, it's hard to beat International Radio (Inrad).
Mike
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Re: [drakelist] AM Filter Advice for TR-7

2005-01-01 Thread Jim Shorney

"Jim Shorney" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
On Sat, 01 Jan 2005 16:16:54 -0500, Garey Barrell wrote:

>Something else is going on if you are hearing a signal that is 45 kHz away!
>
>Unless you are living next to CHU and listening to a QRP signal from 
>Tibet, something else is wrong!  You don't have the calibrator switched 
>on do you?  Or the RV-7/75 external PTO?  Is the card cage shield in 
>place with ALL screws?   DO you live under the CHU tower?  :-)

Maybe bad filter capacitors on the DC-DC converter board? I could QSO
on three different frequencies at once when my TR7 had this disease.
Potentially handy, but it didn't do much for RX performance in a
crowded band. Check to see if you can recieve a strong signal about 23
KHz above and/or below the true frequency.



-- 
Jim Shorney  -->.<--Put complaints in this box
jshorney (at) inebraska.com
nu0c (at) amsat.org
Ham Radio NU0C
Lincoln, NE, USA
EN10ps
http://incolor.inetnebr.com/jshorney/

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Re: [drakelist] drake AC-4R replacement pcb kits

2005-01-01 Thread Michael M. Felack
"Michael M. Felack" <[EMAIL PROTECTED]> made an utterence to the drakelist 
gang
--
I got one of Mike's kits and they are superb!!!
If you have an AC-4, sooner or later you'll want
to have one of these to rebuild it. I'd get one at
that price and put it away for that day.
You won't be disappointed.
Happy New Year and 73s,
Mike WA3WOM
- Original Message - 
From: "mike bryce" <[EMAIL PROTECTED]>
To: 
Sent: Saturday, January 01, 2005 3:16 PM
Subject: [drakelist] drake AC-4R replacement pcb kits


mike bryce <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
Boys and girls...
Snow's gone (for now) and it's almost spring like out. Washed and wax my
jeep, can't wait to take the top off again,  so feeling good...
that being said..
anyone wishing to get a drake AC-4R replacement pcb kit:
until Jan 7 2005
Kits are $10 off of current price of $65
more into? Sure. Point your browser to:
http://www.theheathkitshop.com/drakeac4rreplace.html
Remember, this is only good till Jan 7, 2005
Have a great new year!!
Mike Bryce WB8VGE
SunLight Energy Systems
http://www.seslogic.com
http://www.theheathkitshop.com
"Electricity at the speed of light"
--
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Re: [drakelist] R-4B and T-4XB cable question

2005-01-01 Thread eqtc

[EMAIL PROTECTED] made an utterence to the drakelist gang
--
Hi all,

First of all I wish all of you a very good New Year 2005!

I started 2005 by completing my R4C receiver with a T4XC, that was
standing lonely in the attic of PE9PE, one of the locals here. I was
playing with the C-line twins today and all the memory's of my early years
as a ham (licensed in 1976) came back alive when I adjusted plate, loading
and all again.

What I kept wondered about though was the difference in signal level
between the PTO of the TX compared to the RX. But now I know! I have used
an audio cable for the INJ! Thanks to the message below that problem was
easely fixed hi!!

See you on the air, with either the "new" C-line or my TR7/R7A/L75!

Dick/PA2DW


>
> Garey Barrell <[EMAIL PROTECTED]> made an utterence to the drakelist
> gang
> --
> Alan -
>
> Look at the INJ cable and see if it has white insulation in the
> connectors.  The originals also had a tag on ONLY the INJ cable, and did
> NOT use RG-62.
>
> RG-62 will work, but is heavy, stiff and larger than the correct cable.
>
> If you have a capacitance meter of some sort available, you can check
> the capacitance of the cables and compare them with the values in the
> note you referenced.
>
> If you align the pair (actually only the INJ trimmer adjustments) with
> the cables connecting them together you will find only slightly less
> drive available to the transmitter when running transceive with receiver
> PTO control if you use standard audio patch cable for the INJ line.
>
> 73, Garey - K4OAH
> Atlanta
>
>
> [EMAIL PROTECTED] wrote:
>
>>[EMAIL PROTECTED] made an utterence to the drakelist gang
>>--
>>I have a R-4B and T-4XB and it came with a set  of what looks like
>> original
>>interconnecting cables. They are all look like gray  microphone connector
>> cable
>>with RCA jacks and with tags on them that look as if  they were from the
>>mfgr. I have read the INJ cable needs to be an RG-62. I was a  bit
>> confused by the
>>set.
>>
>>I found this  note:
>>http://www.mail-archive.com/drakelist@www.zerobeat.net/msg02354.html
>>
>>This  note appears to say you don't need the RG-62 if the sets are
>> aligned
>>with the  other cable. Am I better off getting the RG-62 cable?
>>
>>Thanks
>>
>>Alan  KB7MBI
>>
>>
>>
> --
> On Behalf of Garey Barrell <[EMAIL PROTECTED]>
> Submissions:drakelist@www.zerobeat.net
> Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in
> body
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> Brought to you courtesy of TLCHost.net  http://www.tlchost.net/
> --
>


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RE: [drakelist] AM Filter Advice for TR-7

2005-01-01 Thread Jim DiMauro

"Jim DiMauro" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
Many thanx to all who responded.  I'm going to start by checking the shields
tomorrow morning.  I'll let the group know what I find.  Also, thanx for the
input on filter sources.  If I'm going to spend nearly $100 for a filter,
it's going to be a new one.  Since there's no clear winner out there among
filter suppliers, I'll liok at Inrad and Sherwood, who both offer filters
for the TR-7.  But first, the shields & grounds...

73,
Jim
WA2MER

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Jim Shorney
Sent: Saturday, January 01, 2005 5:55 PM
To: Drakelist; [EMAIL PROTECTED]
Subject: Re: [drakelist] AM Filter Advice for TR-7



"Jim Shorney" <[EMAIL PROTECTED]> made an utterence to the drakelist
gang
--
On Sat, 01 Jan 2005 16:16:54 -0500, Garey Barrell wrote:

>Something else is going on if you are hearing a signal that is 45 kHz away!
>
>Unless you are living next to CHU and listening to a QRP signal from
>Tibet, something else is wrong!  You don't have the calibrator switched
>on do you?  Or the RV-7/75 external PTO?  Is the card cage shield in
>place with ALL screws?   DO you live under the CHU tower?  :-)

Maybe bad filter capacitors on the DC-DC converter board? I could QSO
on three different frequencies at once when my TR7 had this disease.
Potentially handy, but it didn't do much for RX performance in a
crowded band. Check to see if you can recieve a strong signal about 23
KHz above and/or below the true frequency.



--
Jim Shorney  -->.<--Put complaints in this box
jshorney (at) inebraska.com
nu0c (at) amsat.org
Ham Radio NU0C
Lincoln, NE, USA
EN10ps
http://incolor.inetnebr.com/jshorney/

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Re: [drakelist] AM Filter Advice for TR-7

2005-01-01 Thread VE3AX

"VE3AX" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
Jim:

Garey has given you very good advice.

While you are in there, I'd check the PIN diodes as well.  There are two on
the front HPF board that look like two lead transistors.  You can check them
with an ohmmeter.  The three on the rear HPF board are high power PIN diodes
and are a little more difficult to get at to check but you can get a good
idea if there is a problem with them by checking the two DC pins near the
top of the board.  One gives essentially zero volts on rx and the other is
+12VDC on rx; on tx they switch.  You should not see any more than 0.3 volts
or so on the "low" reading.  If you get, say, +12 on tx and +4 on rx there
is a problem.  Of course the other "symptom" of bad PIN diodes is low power
output on 15 and 10 meters.

My 1st TR7 had weak AM broadcast spurs all across the bands right up through
28 Mhz with one bad PIN diode.

I have two TR-7's with the 390 ohm resistor in the AM filter position and it
works just fine.
I don't see a lot of difference between those two and the two with the AM
filters.

73

Peter
VE3AX


- Original Message -
From: "Jim DiMauro" <[EMAIL PROTECTED]>
To: "Drakelist" 
Sent: Saturday, January 01, 2005 11:17 PM
Subject: RE: [drakelist] AM Filter Advice for TR-7


>
> "Jim DiMauro" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
> --
> Many thanx to all who responded.  I'm going to start by checking the
shields
> tomorrow morning.  I'll let the group know what I find.  Also, thanx for
the
> input on filter sources.  If I'm going to spend nearly $100 for a filter,
> it's going to be a new one.  Since there's no clear winner out there among
> filter suppliers, I'll liok at Inrad and Sherwood, who both offer filters
> for the TR-7.  But first, the shields & grounds...
>
> 73,
> Jim
> WA2MER
>
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Jim Shorney
> Sent: Saturday, January 01, 2005 5:55 PM
> To: Drakelist; [EMAIL PROTECTED]
> Subject: Re: [drakelist] AM Filter Advice for TR-7
>
>
>
> "Jim Shorney" <[EMAIL PROTECTED]> made an utterence to the drakelist
> gang
> --
> On Sat, 01 Jan 2005 16:16:54 -0500, Garey Barrell wrote:
>
> >Something else is going on if you are hearing a signal that is 45 kHz
away!
> >
> >Unless you are living next to CHU and listening to a QRP signal from
> >Tibet, something else is wrong!  You don't have the calibrator switched
> >on do you?  Or the RV-7/75 external PTO?  Is the card cage shield in
> >place with ALL screws?   DO you live under the CHU tower?  :-)
>
> Maybe bad filter capacitors on the DC-DC converter board? I could QSO
> on three different frequencies at once when my TR7 had this disease.
> Potentially handy, but it didn't do much for RX performance in a
> crowded band. Check to see if you can recieve a strong signal about 23
> KHz above and/or below the true frequency.
>
>
>
> --
> Jim Shorney  -->.<--Put complaints in this box
> jshorney (at) inebraska.com
> nu0c (at) amsat.org
> Ham Radio NU0C
> Lincoln, NE, USA
> EN10ps
> http://incolor.inetnebr.com/jshorney/
>
> --
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