Re: [Drakelist] TR-4 CW VOX Delay

[Gary Poland]

I have found that to get the CW delay that I prefer, increasing R106 above 3.3 
meg is not enough. In fact you will reach a point where the VOX will hang. I 
suggest replacing C143 with a .47 ufd capacitor and then experiment with values 
for R106. You could instead mount a pot in an unused hole at the rear of the 
TR-4 for varying the delay.

73, Gary W8PU
http://home.roadrunner.com/~w8pu

 ___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

Re: [Drakelist] T-4XC carrier in the R-4C receiver

[dassaf]

> If the bias is ok, then Check the screen resistors on the final tubes.
These resistors occasionally fail.  Note:  most tube checkers do not have
the current to "check" a 6jb6 accurately.

Good luck. 


David Assaf, III
>From W5XU Desktop

-Original Message-
From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net]
On Behalf Of Garey Barrell
Sent: Saturday, January 23, 2010 12:04 PM
To: drakelist@zerobeat.net
Subject: Re: [Drakelist] T-4XC carrier in the R-4C receiver

Sounds like the Bias supply may have failed, or be failing.  Have you been
able to set the transmitter idle current per the manual?.

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line&  TR-4/C Service Supplement CDs 


k...@juno.com wrote:
> I recently acquired a R-4C receiver and T-4XC and the transmitter has a
problem. With power applied to it after warm up the meter on transmitter
will go negative to the left of zero and i get a carrier in the receiver at
about 60 db on the same frequency on both VFO's. checked all tubes and they
seem to be OK. The carrier will change in amplitude with tuning of the final
tank for max output. Could someone give me an idea on what to do to trouble
shoot it.
>
> Rex Meier
> KQ0Z
>
>

___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist
No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 9.0.730 / Virus Database: 271.1.1/2640 - Release Date: 01/23/10
01:33:00


___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

Re: [Drakelist] TR-4 CW VOX Delay

[dassaf]

Look at the schematic.  Adjusting r 106 will adjust the delay.  This is a
stock 3.3 M resistor, increasing it will increase the delay.  I have done
this before and it brings the control in line that the same setting on the
antivox control is good for both cw and ssb.  apparently, not all radios
need this change to bring both cw and ssb into line with the delay.
 
Good luck.
 
David Assaf, III
>From W5XU Desktop
 

  _  

From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net]
On Behalf Of Philip Grocki
Sent: Saturday, January 23, 2010 3:11 PM
To: Drakelist@zerobeat.net; captc...@flash.net
Subject: Re: [Drakelist] TR-4 CW VOX Delay



Curt:
 
I "feel your pain" on this problem.   What I finally did was follow a little
paragraph "ditty" in the TR-4C's manual (and Ron Baker's suggestion) and
added a small manual "on-off" switch plugged into the mike socket.  It works
for me.
 
Like you, I found it VERY annoying having the CW/VOX relay "drop-out"
practically between characters.  
 
W8PSG  


--- On Sat, 1/23/10, Curt Nixon  wrote:



From: Curt Nixon 
Subject: [Drakelist] TR-4 CW VOX Delay
To: Drakelist@zerobeat.net
Date: Saturday, January 23, 2010, 11:28 AM


Good Morning All:

Playing with a nice TR4 here and wondering if there is a way to extend the
delay when using CW mode.  I see very little difference from CCW to CW on
the VOX control in CW although it works fine in SSB. 
Would like to lengthen the drop out time without messing up the VOX level
control.

Thnks

Curt
KU8L

___
Drakelist mailing list
Drakelist@zerobeat.net
 
http://mailman.zerobeat.net/mailman/listinfo/drakelist


No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 9.0.730 / Virus Database: 271.1.1/2640 - Release Date: 01/23/10
01:33:00


___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

Re: [Drakelist] TR-4 CW VOX Delay

[Philip Grocki]

Curt:
 
I "feel your pain" on this problem.   What I finally did was follow a little 
paragraph "ditty" in the TR-4C's manual (and Ron Baker's suggestion) and added 
a small manual "on-off" switch plugged into the mike socket.  It works for me.
 
Like you, I found it VERY annoying having the CW/VOX relay "drop-out" 
practically between characters.  
 
W8PSG  


--- On Sat, 1/23/10, Curt Nixon  wrote:


From: Curt Nixon 
Subject: [Drakelist] TR-4 CW VOX Delay
To: Drakelist@zerobeat.net
Date: Saturday, January 23, 2010, 11:28 AM


Good Morning All:

Playing with a nice TR4 here and wondering if there is a way to extend the 
delay when using CW mode.  I see very little difference from CCW to CW on the 
VOX control in CW although it works fine in SSB. 
Would like to lengthen the drop out time without messing up the VOX level 
control.

Thnks

Curt
KU8L

___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist
___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

Re: [Drakelist] TR-4 CW VOX Delay

[Mike]

I used a foot switch for keying my TR4CW; it made operating much smoother 
without modifying the radio and without as much of the relay clatter



73 de W4DLMike
Pompano Beach, FL USA



- Original Message - 
From: "Garey Barrell" 

To: "Drakelist" 
Sent: Saturday, January 23, 2010 11:46 AM
Subject: Re: [Drakelist] TR-4 CW VOX Delay



Curt -

VOX delay is adjusted with R106, which is selected at final test.  It is 
designed for SSB, as is the rest of the TR-4.  You  _might_  be able to 
find a value that is a reasonable compromise over the narrow range of 
adjustment provided by the VOX GAIN control, but ...


Initial value for R106 is 3.3M.  Depending upon how you feel about 
modifications, you could replace R106 with a pot and mount it on the rear 
panel.


73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line&  TR-4/C Service Supplement CDs



Curt Nixon wrote:

Good Morning All:

Playing with a nice TR4 here and wondering if there is a way to extend
the delay when using CW mode.  I see very little difference from CCW
to CW on the VOX control in CW although it works fine in SSB.
Would like to lengthen the drop out time without messing up the VOX
level control.

Thnks

Curt
KU8L



___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist 



___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

Re: [Drakelist] T-4XC carrier in the R-4C receiver

[Garey Barrell]

Sounds like the Bias supply may have failed, or be failing.  Have you 
been able to set the transmitter idle current per the manual?.


73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line&  TR-4/C Service Supplement CDs



k...@juno.com wrote:

I recently acquired a R-4C receiver and T-4XC and the transmitter has a 
problem. With power applied to it after warm up the meter on transmitter will 
go negative to the left of zero and i get a carrier in the receiver at about 60 
db on the same frequency on both VFO's. checked all tubes and they seem to be 
OK. The carrier will change in amplitude with tuning of the final tank for max 
output. Could someone give me an idea on what to do to trouble shoot it.

Rex Meier
KQ0Z

   


___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

[Drakelist] T-4XC carrier in the R-4C receiver

[k...@juno.com]

I recently acquired a R-4C receiver and T-4XC and the transmitter has a 
problem. With power applied to it after warm up the meter on transmitter will 
go negative to the left of zero and i get a carrier in the receiver at about 60 
db on the same frequency on both VFO's. checked all tubes and they seem to be 
OK. The carrier will change in amplitude with tuning of the final tank for max 
output. Could someone give me an idea on what to do to trouble shoot it. 

Rex Meier
KQ0Z


Love Spell
Click here to light up your life with a love spell!
http://thirdpartyoffers.juno.com/TGL2131/c?cp=CH0uhEhY-Fy2WuECIAwM2gAAJz0UFYKTAyySMiC3nbWXP64QAAYAAADNRwA=

___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

Re: [Drakelist] TR-4 CW VOX Delay

[Garey Barrell]

Curt -

VOX delay is adjusted with R106, which is selected at final test.  It is designed for SSB, as is the 
rest of the TR-4.  You  _might_  be able to find a value that is a reasonable compromise over the 
narrow range of adjustment provided by the VOX GAIN control, but ...


Initial value for R106 is 3.3M.  Depending upon how you feel about modifications, you could replace 
R106 with a pot and mount it on the rear panel.


73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line&  TR-4/C Service Supplement CDs



Curt Nixon wrote:

Good Morning All:

Playing with a nice TR4 here and wondering if there is a way to extend
the delay when using CW mode.  I see very little difference from CCW
to CW on the VOX control in CW although it works fine in SSB.
Would like to lengthen the drop out time without messing up the VOX
level control.

Thnks

Curt
KU8L



___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

Re: [Drakelist] 34PNB?

[Garey Barrell]

Not that I'm aware of.

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line&  TR-4/C Service Supplement CDs



Curt Nixon wrote:
Is there a source for boards / cloning info for the 34PNB Noise 
Blanker for the TR4?


If not, is there any interest in having boards made up?

Curt
KU8L




___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

[Drakelist] 34PNB?

[Curt Nixon]

Is there a source for boards / cloning info for the 34PNB Noise Blanker 
for the TR4?


If not, is there any interest in having boards made up?

Curt
KU8L

___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

[Drakelist] TR-4 CW VOX Delay

[Curt Nixon]

Good Morning All:

Playing with a nice TR4 here and wondering if there is a way to extend 
the delay when using CW mode.  I see very little difference from CCW to 
CW on the VOX control in CW although it works fine in SSB. 

Would like to lengthen the drop out time without messing up the VOX 
level control.


Thnks

Curt
KU8L

___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist