[Drakelist] Passband tuner hard to turn

2011-10-29 Thread Neil M Califano
The pass band tuner on my R4A grinds a little when I turn it for about 20% of 
the 360 degree range. Any idea what is wrong? Typically this happens after a 
lot of use.

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[Drakelist] Drake TR-7A VCXO xtal problem

2011-10-29 Thread Ron Ries
I sent the OEM 13.695 MHz xtal into ICM and asked that they duplicate the 
operating characteristics. The xtal I received from them will operate on 13.695 
MHz but is unable to be pulled the necessary +/- 3 KHz in the VCXO circuit. I 
can only get +/- 1.7 Khz, not enough.

Bottom line: ICM xtals made for the 13.695 MHz VCXO will not operate properly 
in the VCXO circuit. I am $50 poorer and no operating xtals from ICM.

I re-installed the OEM xtal, aligned and the TR-7A is working beautifully.

Ron
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Re: [Drakelist] Passband tuner hard to turn

2011-10-29 Thread Steve Wedge
This assembly can be taken apart and is fairly easy.  The grease in your PBT 
is probably all dried-out.  You'll need to unsolder the box at the rear, 
remove the screws and then pull the slug rack straight back (after removing 
the knob on the front, of course).  I've had lithium grease recommended as 
the replacement - use a modest amount.  You'll notice that the round disc at 
the back end of the shaft is spring-loaded against the front and has varying 
thickness - which is how the slug rack goes in and out.  Put a little light 
lube on the shaft, too.


The whole thing goes back together easily.  Tighten the screws and re-solder 
and you're done.  Set the knob per the alignment procedure: slugs fully back 
should have the knob pointing at 9 o'clock.


73,

Steve Wedge, W1ES/4

To be is to do - Socrates
To do is to be - Plato
Do be do be do. - Sinatra

All my computers have my signature with various pearls of wisdom appended 
thereto.



--
From: Neil M Califano cchange...@yahoo.com
Sent: Saturday, October 29, 2011 2:10 AM
To: Drakelist@zerobeat.net
Subject: [Drakelist] Passband tuner hard to turn

The pass band tuner on my R4A grinds a little when I turn it for about 20% 
of the 360 degree range. Any idea what is wrong? Typically this happens 
after a lot of use.


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[Drakelist] Please standby

2011-10-29 Thread Neil M Califano
The standby mode on the R4A isn't really electrically standby is it? It seems 
to be only an audio muting.

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[Drakelist] Xtals

2011-10-29 Thread GARY ELLIOT
I need a 39.1 Mhz xtal for 10 meters CW (1 or 2)
I have the following excess to my needs:
1.5 Mhz
14.1 Mhz
15.4 Mhz
15.6 Mhz

Trade - swap or Buy the 10 meter CW xtal

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Re: [Drakelist] Please standby

2011-10-29 Thread Steve Wedge
I always assumed it was as if it was muted.  I believe you still have all 
the plate and screen voltages.


Steve Wedge, W1ES/4

To be is to do - Socrates
To do is to be - Plato
Do be do be do. - Sinatra

All my computers have my signature with various pearls of wisdom appended 
thereto.



--
From: Neil M Califano cchange...@yahoo.com
Sent: Saturday, October 29, 2011 5:29 PM
To: Drakelist@zerobeat.net
Subject: [Drakelist] Please standby

The standby mode on the R4A isn't really electrically standby is it? It 
seems to be only an audio muting.


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[Drakelist] R-4b

2011-10-29 Thread Ron Ries
Hi All,

I am in the process of restoring one of those R-4B radios that were offered on 
this list. I have never owned an R-4B and I have a couple of questions:

First of all, I have the receiver 95% operational.

1) I am used to the S meter on other radios going to full scale when RF gain is 
reduced to zero. The R4b doesn't do that. Also, the RF gain control just 
reduces background noise level by about 5 S units while the signal remains 
about the same. Is this normal?

2)I think the previous owner made some changes in the AVC circuitry. As it 
stands now AVC fast seems to operate as it would in any other radio, a fairly 
fast tracking rate. AVC slow, however, is really slow taking a full 4-5 seconds 
for the S meter reading to decay in the absence of a signal. Is this normal? I 
will be examining the AVC circuitry for mods tomorrow but won't dive into that 
if this is normal operation. AVC off works as normal.

3) Last question: With RF gain fully CW on the R4B the ambient (no signal) 
noise level is 3-4 S units above where the TS-850 and TS-480 indicate the noise 
level is for the same antenna system (trap dipole up 27') and RF gain full on. 
Is this an indication that tube radios have a higher sensitivity to atmospheric 
noise? With the RF gain fully CCW the indicated noise level on the R4B is 
comparable to the newer radios with RF gain full on. Not sure what to make of 
this.

Thanks!

Ron
KK7KZ
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Re: [Drakelist] Please standby

2011-10-29 Thread Garey Barrell
The AVC bus is allowed to float to maximum, effectively cutting off all 
AVC controlled stages.


The front panel FUNCTION switch must be on ON, NB or CAL for the 
external mute to take effect.


--
73, Garey - K4OAH
St Charles, IL

Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
www.k4oah.com


Neil M Califano wrote:

The standby mode on the R4A isn't really electrically standby is it? It seems 
to be only an audio muting.




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[Drakelist] Passband tuner

2011-10-29 Thread Neil M Califano
What is the range in khz of the R4A passband tuner? Is there a range in khz 
like a fine tuning?

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[Drakelist] AC-3 vs AC-4

2011-10-29 Thread Steve Wedge
I just acquired another small pile of Drake gear from a friend.  He gave the 
rest to me in exchange for cleaning and aligning the T-4X and returning it with 
PS.  Included with the gear was a TR-3 in pretty rough shape - not sure what 
I'll do with this aside from part it out.  There are, however, two AC-3's (and 
a MS-3), so the whole deal is pretty good regardless (besides, he's my friend 
and has worked on some of my old Johnson stuff in years past).

The main question is this: what's the major difference between the AC-3 and the 
AC-4?  Is it strictly the parts locations and the absence of the VOX RLY 
connector?

Enjoy Those Drakes...

Steve Wedge, W1ES/4

To be is to do - Socrates
To do is to be - Plato
Do be do be do. - Sinatra

All my computers have my signature with various pearls of wisdom appended 
thereto.
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Re: [Drakelist] Drake TR-7A VCXO xtal problem

2011-10-29 Thread Jim Shorney
On Sat, 29 Oct 2011 06:18:47 -0600, Ron Ries wrote:

I sent the OEM 13.695 MHz xtal into ICM and asked that they duplicate the 
operating characteristics. The xtal I received from them will operate on 
13.695 MHz but is unable to be pulled the necessary +/- 3 KHz in the VCXO 
circuit. I can only get +/- 1.7 Khz, not enough.

Bottom line: ICM xtals made for the 13.695 MHz VCXO will not operate properly 
in the VCXO circuit. I am $50 poorer and no operating xtals from ICM.


It sounds like the original crystal may not be a standard cut that would be
used for that frequency. Did you tell ICM that the crystal was in a VXO? Did
you send them a schematic of the oscillator? I would think that they would
still want to make things right with it.

73

-Jim


--
Ham Radio NU0C
Lincoln, Nebraska, U.S.S.A.
TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, 
HyGain 3750, IBM PS/2 - all vintage, all the time!

Give a man a URL, and he will learn for an hour; teach him to Google, and he 
will learn for a lifetime.

HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/
http://incolor.inetnebr.com/jshorney
http://www.nebraskaghosts.org



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[Drakelist] FW: MC4016P for the UV3

2011-10-29 Thread David
Hanks to Curt, KU8L, I have received the MC4016P chips.  BGMicro had a
zillion of them.  Put one in place of the bad one and still no joy.  It is
locking up on a different frequency.  Note the test was after I tried a good
divider board from the other unit and it worked fine.  

So, does anyone know if a source of extender boards for the UV3?  The one
needed is to essentially extend the connection of a 22 pin, double sided
computer board type socket.  After that I can then trouble shoot further.
After this is fixed, I will tackle the no output on the 440 board.

Many thanks for the help. 

David Assaf, III
W5XU

-Original Message-
From: David Assaf [mailto:w...@cox.net] 
Sent: Thursday, October 27, 2011 8:45 AM
To: David 3
Subject: Re: MC4016P

Have them ordered. Again many thanks for the tip. Will be nice to get this
one off the bench. Have more in line. Hopefully it will do the trick. 

Sent from my iPhone
David Assaf, III

On Oct 25, 2011, at 10:54, David 3 w...@cox.net wrote:

 
 
 -Original Message-
 From: Curt [mailto:cptc...@flash.net]
 Sent: Monday, October 10, 2011 9:35 AM
 To: David
 Subject: MC4016P
 
 Think I got the last ones I used here.  Not certain because its been a 
 while but I see they still have them listed and addable to their 
 shopping carts.
 
 Hope this helps..let me know how it goes and if they are not 
 available, I will look deeper here.
 
 Curt
 KU8L
 
 http://www.bgmicro.com/ics1028.aspx
 


-
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.1834 / Virus Database: 2092/4579 - Release Date: 10/27/11



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Re: [Drakelist] AC-3 vs AC-4

2011-10-29 Thread Jim Shorney
On Sat, 29 Oct 2011 20:04:23 -0400, Steve Wedge wrote:

The main question is this: what's the major difference between the AC-3 and 
the AC-4?  Is it strictly the parts locations and the absence of the VOX RLY 
connector? 

See the thread here:

http://www.mail-archive.com/drakelist@zerobeat.net/msg04591.html

73

-Jim


--
Ham Radio NU0C
Lincoln, Nebraska, U.S.S.A.
TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, 
HyGain 3750, IBM PS/2 - all vintage, all the time!

Give a man a URL, and he will learn for an hour; teach him to Google, and he 
will learn for a lifetime.

HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/
http://incolor.inetnebr.com/jshorney
http://www.nebraskaghosts.org



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[Drakelist] TR-7A xtal issue

2011-10-29 Thread Ron Ries
Jim,

They had a schematic, a crystal with which they took all the important 
measurements, knew it was in a VCXO circuit with all the expected performance 
specs and we had at least 10  telephone conversations discussing the obvious 
problems. Still didn't turn out like the OEM xtal. I have contacted them with 
the result and am awaiting a return communication. It's been several days now….

R.
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Re: [Drakelist] TR-7A xtal issue

2011-10-29 Thread Jim Shorney

Sounds like you covered all the bases. I hope someone doesn't have to send them
a whole radio.

73

-Jim


On Sat, 29 Oct 2011 18:18:59 -0600, Ron Ries wrote:

Jim,

They had a schematic, a crystal with which they took all the important 
measurements, knew it was in a VCXO circuit with all the expected performance 
specs and we had at least 10  telephone conversations discussing the obvious 
problems. Still didn't turn out like the OEM xtal. I have contacted them with 
the result and am awaiting a return communication. It's been several days now….

R.
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--
Ham Radio NU0C
Lincoln, Nebraska, U.S.S.A.
TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, 
HyGain 3750, IBM PS/2 - all vintage, all the time!

Give a man a URL, and he will learn for an hour; teach him to Google, and he 
will learn for a lifetime.

HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/
http://incolor.inetnebr.com/jshorney
http://www.nebraskaghosts.org



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[Drakelist] WTB: Drake 2B Faceplate

2011-10-29 Thread Ferris Jennings
Sorry if this is a duplicate email. I had a bit of trouble with my Outlook
today.

 

I'm restoring a 2B  s/n 11222. It's in very good condition except someone
drilled a small hole in the faceplate, not sure for what reason,  to the
right of the AF Gain knob. The plate is in great condition, except for the
hole.

 

Before I go tearing up another 2B just to get the faceplate, I thought I'd
see if anyone out here has a very good condition plate they'd like to sell.
It needs to be scratch and ding free, no visible rust,  and with all the
letters and numbers clean and white.

 

Thanks much

 

Ferris Jennings NB6T

 

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Re: [Drakelist] AC-3 vs AC-4

2011-10-29 Thread Steve Wedge

TNX, Jim.  Shoulda known someone else would've brought it up by now.

I've just been given an AC-3; I assumed it would play with all the 4-line, 
so it's a nice gift indeed.


The MS-3's a nice bonus.  I'm thinking the TR-3 is a basket case, though. 
Definitely worth it if any of the tubes are good - especially the finals.


Steve Wedge, W1ES/4

To be is to do - Socrates
To do is to be - Plato
Do be do be do. - Sinatra

All my computers have my signature with various pearls of wisdom appended 
thereto.



--
From: Jim Shorney jshor...@inebraska.com
Sent: Saturday, October 29, 2011 8:14 PM
To: Drake List drakelist@zerobeat.net
Subject: Re: [Drakelist] AC-3 vs AC-4


On Sat, 29 Oct 2011 20:04:23 -0400, Steve Wedge wrote:

The main question is this: what's the major difference between the AC-3 
and the AC-4?  Is it strictly the parts locations and the absence of the 
VOX RLY connector?


See the thread here:

http://www.mail-archive.com/drakelist@zerobeat.net/msg04591.html

73

-Jim


--
Ham Radio NU0C
Lincoln, Nebraska, U.S.S.A.
TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, 
GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time!


Give a man a URL, and he will learn for an hour; teach him to Google, and 
he will learn for a lifetime.


HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/
http://incolor.inetnebr.com/jshorney
http://www.nebraskaghosts.org



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Re: [Drakelist] AC-3 vs AC-4

2011-10-29 Thread Ron
And based on the AC3, there is a test point which is normally tied to ground.  
When you lift it from ground, you measure voltage drop across a resistor.  This 
voltage happens to directly relate to final current.  This allows you to easily 
adjust the bias w/o trying to figure out how accurate the rig's meter is 
calibrated, etc.

I modified my AC4R PCB to include a resistor etc.  Sent the data to Wb4HFN.  
Don't think it was ever posted on his site.

73,
Ron WD8SBB

--- On Sat, 10/29/11, Jim Shorney jshor...@inebraska.com wrote:

 From: Jim Shorney jshor...@inebraska.com
 Subject: Re: [Drakelist] AC-3 vs AC-4
 To: Drake List drakelist@zerobeat.net
 Date: Saturday, October 29, 2011, 8:14 PM
 On Sat, 29 Oct 2011 20:04:23 -0400,
 Steve Wedge wrote:
 
 The main question is this: what's the major difference
 between the AC-3 and the AC-4?  Is it strictly the
 parts locations and the absence of the VOX RLY connector? 
 
 See the thread here:
 
 http://www.mail-archive.com/drakelist@zerobeat.net/msg04591.html
 
 73
 
 -Jim
 
 
 --
 Ham Radio NU0C
 Lincoln, Nebraska, U.S.S.A.
 TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A,
 R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage,
 all the time!
 
 Give a man a URL, and he will learn for an hour; teach him
 to Google, and he will learn for a lifetime.
 
 HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/
 http://incolor.inetnebr.com/jshorney
 http://www.nebraskaghosts.org
 
 
 
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 Drakelist mailing list
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[Drakelist] T4XB Poor Transmit audio

2011-10-29 Thread Paul Gerhardt
After receiving good audio reports for a year or so on the B line,
suddenly am getting poor audio reports on the T4XB.  Listening to the
audio on the R4B with the mute off it sounds almost 'OK' and I would
think it was just overload into the R4 not really hum or RF on the
audio but more like listening to two receivers one on each side of the
room a few cycles off each other.  I have tried swapping the AC-4
(that has new filters) with another working AC-3 with little change in
reports.   Are any other troubleshooting ideas?  It has been working
fine since last winter.  I check into the same 40M net and the same
people who usually say the audio is good now say there is something
'not right' with the audio.





-- 
Paul Gerhardt
K3PG
http://pgerhardt.blogspot.com
QRP ARCI 6674
FP 274
You must do this work with love or you fail. -- John Muir, from How
to Keep Your Volkswagen Alive

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Re: [Drakelist] AC-3 vs AC-4

2011-10-29 Thread Don Cunningham

Steve,
If I remember correctly, the finals in the TR3 are 12JB6's, not 6JB6's so 
not compatible with the T4(any).  My memory isn't what it used to be, but 
that's what comes through the fog.  There's also no cover over the top of 
the power supply.  If you use the Heathkit Shop's board, download his 
special instructions for putting it in the AC3.

73,
Don, WB5HAK 



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