[Drakelist] Drake R4 serial numbet

[John King]

My Drake R4 is serial number 861. John, K5PGW



  

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Re: [Drakelist] R-4 serials

[Don Cunningham]

Speaking of Donnie, does ANYONE know what happened to him in relation to 
Drakes and Drake parts??  I really miss his participation in the reflector, 
and he was just starting to build a nice group of accessories that are 
needed.  I do see him posting occasionally on QTH.com and other places, but 
nothing Drake related.

73,
Don, WB5HAK 



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Re: [Drakelist] R-4 serials

[Garey Barrell]

Al -

Yeah, Donnie did a good job with that. We miss his 'special' parts, 
especially the little red ones!  :-)


I just finished doing a CD for the A-Line, so have some stuff together.

The 11 Tube R-4A started at s/n 4054.  The last version started at s/n 
5400, and went through to close to 7000 where the B started.  The 
'model' for the CD was a 6600 series unit, and had several changes from 
the last schematic.  According to Bill Frost, there were a 'bunch of 
changes' just after the last schematic was issued, and apparently not 
documented.  There were enough changes that I made a 'Revised' schematic 
that showed what was actually in 'this' receiver.


Most of the changes from the late "A" to the early "B" receiver were 
cosmetic.  Most important was the change to black labels above the 
'belt-line' on the front panel!  The MAIN TUNING knob was 'dished' a bit 
to allow a "PTO in USE" light at the fiducial.  The AF Preamp was 
similar to the late "A", and of course the CALIBRATOR added the 25 kHz 
markers.  The FET PTO didn't come in until the second version at s/n 8000.


The color-coded crystal system started around s/n 5000.  I've not been 
able to find any documentation from Drake for it.  The T-4X of course 
started with the color-coded CO crystals at about s/n 12000 and 
continued into the T-4XB.


73, Garey - K4OAH
Glen Allen, VA

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



Al Parker wrote:

Hi agn,
I found it --  Donnie's list.  It's just for the R-4A's, but he 
points out the differences between the 2 versions.  I seem to 
remember, and Garey can probably comment better, that there were some 
more small changes made toward the end of the "late" version, such 
that the very late ones were about the same as an R-4B.

Take a look at

73,

Al, W8UT
www.boatanchors.org
www.hammarlund.info

"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole

On 2/6/2011 4:24 PM, Garey Barrell wrote:

Yes, the R-4 series all are the same serial number string.

The R-4 started at 100 (I believe, I've never seen one below that). The
first schematic is labeled '0001'.

The R-4A started at 2000 with the 13 tube version.

The R-4A continued at 4054 with the 11 tube version.

The R-4B started at 7000

The R-4C started at 16151

The R-4C ended right around 3. I've heard of 30k+ s/n units, but
I've never actually seen one.

The T-4X started at 1

The T-4XB started at 13749

The T-4XC started at 20181

The T-4XC ended just over 3. I've seen a couple with 30k+ s/n.

73, Garey - K4OAH
Glen Allen, VA

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



Al Parker wrote:

basically, yes. Take a look at
 I'm not sure if
the "plain" r-4's are included in the series below the R-4A no.s.
Donnie Garrett had a good listing of the s/n's for the R-4A's, but I
don't know where it might be available now, he dropped out of
circulation a few yrs ago. Anyone know?
73,

Al

On 2/6/2011 2:50 PM, Neil M Califano wrote:

Do the R-4 receivers share the same run of serial numbers, the R-4's
the lowest and the R-4C's the highest?





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Re: [Drakelist] What is he best way to test the N-4B noise blanker?

[kc9cdt]

OK, It seems like Garey's suggestion is the easiest and it 
workstake a jumper lead, hook it to the antenna jack. drag it 
across a large file slowly...it generates nice ignition like noise.


The NB does reduce it quite a bit.
73,
Lee



-Original Message-
From: Richard Knoppow <1oldle...@ix.netcom.com>
To: drakelist 
Sent: Sun, Feb 6, 2011 7:36 pm
Subject: Re: [Drakelist] What is he best way to test the N-4B noise 
blanker?



- Original Message -
From: "Gary Poland" 
To: 
Sent: Sunday, February 06, 2011 2:09 PM
Subject: Re: [Drakelist] What is he best way to test the
N-4B noise blanker?



Anything with brushes, a corless drill, heat gun, etc.
Also a solder station with adjustable heat works great.

73, Gary


Something that works and is simple is to use an ohm
meter on its highest setting. This works especially well
with older meters that have high voltage batteries for the
highest resistance range. Just clip one end of the meter to
the antenna connector and tap it with the other lead. That
makes a large, high level, click. A series of taps applied
to my R-388, which as a slow AVC mod but no blanker,
desensitized it running the S-meter to a high level.
Although the noise limiter removes the clicking it does not
help with the AVC problem. On my Drake R-4B the same thing
happens in either fast or slow AVC without the blanker on,
that is, the AVC desensitizes the reveiver. The Blanker
pretty much eliminates this. While there is still some rise
of the S-meter and reduction of background noise, it is very
much less than when the blanker is turned off.
Note that this is the purpose of the blanker, its not
effective on power line hash, which a plain limiter will
reduce but, since it comes before the AVC detector, its
quite effective in eliminating the desensitizing effect.
I never hear ignition noise except in my own car when
listening to very weak stations. I guess modern ignition
systems has pretty much eliminated it.


--
Richard Knoppow
Los Angeles
WB6KBL
dickb...@ix.netcom.com


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Re: [Drakelist] What is he best way to test the N-4B noise blanker?

[Richard Knoppow]

- Original Message - 
From: "Gary Poland" 

To: 
Sent: Sunday, February 06, 2011 2:09 PM
Subject: Re: [Drakelist] What is he best way to test the 
N-4B noise blanker?



Anything with brushes, a corless drill, heat gun, etc. 
Also a solder station with adjustable heat works great.


73, Gary

Something that works and is simple is to use an ohm 
meter on its highest setting. This works especially well 
with older meters that have high voltage batteries for the 
highest resistance range. Just clip one end of the meter to 
the antenna connector and tap it with the other lead. That 
makes a large, high level, click. A series of taps applied 
to my R-388, which as a slow AVC mod but no blanker, 
desensitized it running the S-meter to a high level. 
Although the noise limiter removes the clicking it does not 
help with the AVC problem. On my Drake R-4B the same thing 
happens in either fast or slow AVC without the blanker on, 
that is, the AVC desensitizes the reveiver. The Blanker 
pretty much eliminates this. While there is still some rise 
of the S-meter and reduction of background noise, it is very 
much less than when the blanker is turned off.
Note that this is the purpose of the blanker, its not 
effective on power line hash, which a plain limiter will 
reduce but, since it comes before the AVC detector, its 
quite effective in eliminating the desensitizing effect.
I never hear ignition noise except in my own car when 
listening to very weak stations. I guess modern ignition 
systems has pretty much eliminated it.



--
Richard Knoppow
Los Angeles
WB6KBL
dickb...@ix.netcom.com 



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[Drakelist] SCC-4 Calibrator for SPR-4

[Bob Jackson]

I'm still looking for and ORIGINAL one. I can DIY one using the circuit board 
picture in the manual, but would rather not. Any help appreciated.

 Bob  AG5X



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Re: [Drakelist] R-4 serials

[Phbjr]

So, based on Garey's serial number figures there  were the following 
approximate number of each model built:
 
R-4:  1,900 (or fewer)
 
R-4A (13-tube):  2,053
 
R-4A (11-tube):  2,946 (or fewer)
 

TOTAL R-4A:  ~4,999
 
R-4B:  9,151
 
R-4C:  ~13,849 (possibly a few more)
 
T-4X:  3,749


T-4XB:  6,432

T-4XC:  9,819 (actually just  over that)

 
 
I suppose that this helps show potential  "rarity" of the different 
models.  Interesting!
 
73/Paul, K4MSG


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Re: [Drakelist] R-4 serials

[Al Parker]

Hi agn,
	I found it --  Donnie's list.  It's just for the R-4A's, but he points 
out the differences between the 2 versions.  I seem to remember, and 
Garey can probably comment better, that there were some more small 
changes made toward the end of the "late" version, such that the very 
late ones were about the same as an R-4B.

Take a look at

73,

Al, W8UT
www.boatanchors.org
www.hammarlund.info

"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole

On 2/6/2011 4:24 PM, Garey Barrell wrote:

Yes, the R-4 series all are the same serial number string.

The R-4 started at 100 (I believe, I've never seen one below that). The
first schematic is labeled '0001'.

The R-4A started at 2000 with the 13 tube version.

The R-4A continued at 4054 with the 11 tube version.

The R-4B started at 7000

The R-4C started at 16151

The R-4C ended right around 3. I've heard of 30k+ s/n units, but
I've never actually seen one.

The T-4X started at 1

The T-4XB started at 13749

The T-4XC started at 20181

The T-4XC ended just over 3. I've seen a couple with 30k+ s/n.

73, Garey - K4OAH
Glen Allen, VA

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



Al Parker wrote:

basically, yes. Take a look at
 I'm not sure if
the "plain" r-4's are included in the series below the R-4A no.s.
Donnie Garrett had a good listing of the s/n's for the R-4A's, but I
don't know where it might be available now, he dropped out of
circulation a few yrs ago. Anyone know?
73,

Al

On 2/6/2011 2:50 PM, Neil M Califano wrote:

Do the R-4 receivers share the same run of serial numbers, the R-4's
the lowest and the R-4C's the highest?



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Re: [Drakelist] What is he best way to test the N-4B noise blanker?

[Gary Poland]

Anything with brushes, a corless drill, heat gun, etc. Also a solder station 
with adjustable heat works great.


73, Gary

http://home.roadrunner.com/~w8pu/ 



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Re: [Drakelist] DSP filters with Drakes

[sebdesnCC]

As someone downthread suggested The David Clark Aero are real good. I have a
pair from my flying days, and they saved my hearing there as well...
73, Bud W0 HG.


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Re: [Drakelist] R-4 serials

[Garey Barrell]

Yes, the R-4 series all are the same serial number string.

The R-4 started at 100 (I believe, I've never seen one below that).   
The first schematic is labeled '0001'.


The R-4A started at 2000 with the 13 tube version.

The R-4A continued at 4054 with the 11 tube version.

The R-4B started at 7000

The R-4C started at 16151

The R-4C ended right around 3.  I've heard of 30k+ s/n units, but 
I've never actually seen one.


The T-4X started at 1

The T-4XB started at 13749

The T-4XC started at 20181

The T-4XC ended just over 3.  I've seen a couple with 30k+ s/n.

73, Garey - K4OAH
Glen Allen, VA

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



Al Parker wrote:
basically, yes.  Take a look at 
  I'm not sure if 
the "plain" r-4's are included in the series below the R-4A no.s. 
Donnie Garrett had a good listing of the s/n's for the R-4A's, but I 
don't know where it might be available now, he dropped out of 
circulation a few yrs ago.  Anyone know?

73,

Al, W8UT
www.boatanchors.org
www.hammarlund.info

"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole

On 2/6/2011 2:50 PM, Neil M Califano wrote:
Do the R-4 receivers share the same run of serial numbers, the R-4's 
the lowest and the R-4C's the highest?




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Re: [Drakelist] R-4 serials

[Al Parker]

basically, yes.  Take a look at 
  I'm not sure if 
the "plain" r-4's are included in the series below the R-4A no.s. 
Donnie Garrett had a good listing of the s/n's for the R-4A's, but I 
don't know where it might be available now, he dropped out of 
circulation a few yrs ago.  Anyone know?

73,

Al, W8UT
www.boatanchors.org
www.hammarlund.info

"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole

On 2/6/2011 2:50 PM, Neil M Califano wrote:

Do the R-4 receivers share the same run of serial numbers, the R-4's the lowest 
and the R-4C's the highest?



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[Drakelist] R-4 serials

[Neil M Califano]

Do the R-4 receivers share the same run of serial numbers, the R-4's the lowest 
and the R-4C's the highest?  


  

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Re: [Drakelist] DSP Filters

[Stan Nafziger]

Ever operate an Elecraft K3?  You might be surprised how "easy it listens"
yet can be very discerning.

Just a thought.

Stan
C-line, TR4, TR7's, 2B, 2C, 2NT

On Sun, Feb 6, 2011 at 9:54 AM, J. Steven Cochrane  wrote:

>  If you "LOVE the mellow sound" you probably won't like the DSP audio
> filters. I have three of them, two Clear Speech Base Noise Filters on my
> TR7s and the Clear Speech speaker in my old Ford Explorer (because it was
> cheaper than a new quiet fuel pump or new car).
> I have been using them for about 10 years on SSB, they do a great job of
> reducing all kinds of noise and a lot of the heterodynes and other QRM.
> Unfortunately, when used on tube equipment they tend to turn that nice
> sounding audio into that annoying solid state audio one gets from the
> "modern" radios.
> When I want to listen to HF for any length of time I use tube equipment, if
> I'm running a net I use modern solid state equipment with DSP so I can dig
> the weak stations out of the noise. As soon as the net is over I shut off
> the solid state rig and turn on one of my sweet sounding tube rigs in order
> to reward and sooth my ears. [image: Smiley emoticon]
>
> Steve
>
> J. Steven Cochrane W7JSC
>
> - Original Message -
> *From:* Don Cunningham 
> *To:* Hunter Ellington  ; drakelist@zerobeat.net
> *Sent:* Saturday, February 05, 2011 4:36 PM
> *Subject:* Re: [Drakelist] DSP Filters
>
> Hunter,
> When you say that, is your usage mostly CW/Digital or SSB??  I am just
> curious, as most of the time I hear this, they really mean on CW.  If that's
> not the case, I'm interested in trying that as I LOVE the mellow sound of my
> R4(X)'s but they sometimes need just a little more help, if you know what I
> mean.
> Tks,
> Don, WB5HAK
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Re: [Drakelist] Drakelist Digest, Vol 32, Issue 22

[Don Jones]

My set of Drake Twins were a R-4A & a T-4X, worked my first 230 countries
using them between 1977 & 1981. That was when and where I was first exposed
to the beauty of passband tuning in fighting qrm. 

Don Jones 
Arlington, WA 

Date: Sun, 6 Feb 2011 11:17:55 -0500
From: Lee Hiers 
To: Diane and Edward Swynar 
Cc: drakelist@zerobeat.net
Subject: Re: [Drakelist] DSP Filters
Message-ID:

Content-Type: text/plain; charset="iso-8859-1"

On Sun, Feb 6, 2011 at 11:07 AM, Diane and Edward Swynar <
deswy...@xplornet.ca> wrote:


> Is your R-4 the "...just-plain-ol'-original-R-4" version, with no "A",
"B",
> or "C" suffix...?
>
>
Yes Eddy, it's an R-4, no suffixactually the first one I've ever
listened to...I had used a lot of C-lines in the past, but never an R-4 or
R-4A...not sure about B-lines.  But the sound of this old rx on cw is very
nice indeed.

 73 de Lee
--
Lee Hiers, AA4GA


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Re: [Drakelist] DSP Filters

[Lee Hiers]

On Sun, Feb 6, 2011 at 11:07 AM, Diane and Edward Swynar <
deswy...@xplornet.ca> wrote:


> Is your R-4 the "...just-plain-ol'-original-R-4" version, with no "A", "B",
> or "C" suffix...?
>
>
Yes Eddy, it's an R-4, no suffixactually the first one I've ever
listened to...I had used a lot of C-lines in the past, but never an R-4 or
R-4A...not sure about B-lines.  But the sound of this old rx on cw is very
nice indeed.

 73 de Lee
--
Lee Hiers, AA4GA
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Re: [Drakelist] DSP Filters

[Diane and Edward Swynar]

Hi Lee,

Is your R-4 the "...just-plain-ol'-original-R-4" version, with no "A", "B",
or "C" suffix...?

If so, welcome to my world! Hi Hi. One doesn't hear too much about the R-4,
it seems---but to me, it's the one that started it all, Hi Hi.

~73~ de Eddy VE3CUI - VE3XZ

PS: YES, I agree with you 101%! If ever a rig could actually make CW sound
like music to one's ears (which you hear a LOT of, when referencing AM fone
reception), the R-4 is, indeed, that rig!


**

- Original Message - 
From: Lee Hiers
Cc: drakelist@zerobeat.net
Sent: Sunday, February 06, 2011 11:00 AM
Subject: Re: [Drakelist] DSP Filters


On Sun, Feb 6, 2011 at 9:54 AM, J. Steven Cochrane  wrote:


If you "LOVE the mellow sound" you probably won't like the DSP audio
filters.


That's exactly what I was thinking, although


Digital recordings that were originally recorded on analog media sound
marginally better to some folks than all-digital recordings.  Similarly,
photographs taken on film that are scanned in become digital photos, yet
they still retain a bit of the original film character that can't *quite* be
duplicated in an all-digital workflow.


I am really enjoying the sound of my newly-acquired R4 on 40 cw...it sounds
better than any rig I've used in the past 30 years - while it may not have
the best ultimate performance, the "sound" is wonderful.  I think an audio
DSP filter would detract from that somewhat...but I can also imagine
conditions where the use of such a device would be an acceptable
compromise...and the radio would still "sound better" thank a newer rig with
the same DSP device.


Just some rambling...


73 de Lee





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Re: [Drakelist] DSP Filters

[Nigel Gunn G8IFF/W8IFF]

Depending upon what you want it to remove.

For background noise removal, I use this one:
http://bhi-ltd.com/index.php/products/noise-cancellation-products/item/noise-cancelling-pcb-modules-low-level/nedsp1061-pcb.html
It can be used in the Rx audio line or the microphone audio to remove 
background tx noise.

If you want to automatically remove several heterodynes or "move" your audio band edges then something manually tunable 
is more apropriate.


On 06-Feb-11 01:38, David wrote:

The add on DSP units are audio DSP filters and they can be very effective.


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Re: [Drakelist] B-line service

[brad WF7T]

My C-line line JUST came back from Ron WB4HFN.  He did an excellent
job at a fair price:
http://www.wb4hfn.com/Services/WB4HFN/RepairHomePage.htm

73 Brad WF7T

On Sun, Feb 6, 2011 at 8:10 AM,   wrote:
> Would like to send the B-line out for service,alignment and a good go thru.
> Can anyone recommend  someone to sent the gear to. I'm in SW Florida.
> thanks
> dale wt4t
>
>
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Re: [Drakelist] DSP Filters

[Lee Hiers]

On Sun, Feb 6, 2011 at 9:54 AM, J. Steven Cochrane  wrote:


>  If you "LOVE the mellow sound" you probably won't like the DSP audio
> filters.
>

That's exactly what I was thinking, although

Digital recordings that were originally recorded on analog media sound
marginally better to some folks than all-digital recordings.  Similarly,
photographs taken on film that are scanned in become digital photos, yet
they still retain a bit of the original film character that can't *quite* be
duplicated in an all-digital workflow.

I am really enjoying the sound of my newly-acquired R4 on 40 cw...it sounds
better than any rig I've used in the past 30 years - while it may not have
the best ultimate performance, the "sound" is wonderful.  I think an audio
DSP filter would detract from that somewhat...but I can also imagine
conditions where the use of such a device would be an acceptable
compromise...and the radio would still "sound better" thank a newer rig with
the same DSP device.

Just some rambling...

73 de Lee
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Re: [Drakelist] What is he best way to test the N-4B noise blanker?

[Garey Barrell]

Lee -

Easiest is to connect a piece of wire to the antenna jack, then drag the 
other end along a grounded surface.  A file is great if you have one, 
but just scratching along a piece of metal works.  Switch the blanker on 
and off in SLOW AVC and you'll the see the average.  Then on FAST AVC 
you hear and see the meter jump.


73, Garey - K4OAH
Glen Allen, VA

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



kc9...@aol.com wrote:

Gang,
I need to test the noise blanker in my R-4CIs there an easy way to 
test it?

No ignition noise here, no electric fences
Tried the hair dryer, and an electric drill
73,
Lee






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Re: [Drakelist] DSP Filters

[J. Steven Cochrane]

If you "LOVE the mellow sound" you probably won't like the DSP audio filters. I 
have three of them, two Clear Speech Base Noise Filters on my TR7s and the 
Clear Speech speaker in my old Ford Explorer (because it was cheaper than a new 
quiet fuel pump or new car). 
I have been using them for about 10 years on SSB, they do a great job of 
reducing all kinds of noise and a lot of the heterodynes and other QRM. 
Unfortunately, when used on tube equipment they tend to turn that nice sounding 
audio into that annoying solid state audio one gets from the "modern" radios.
When I want to listen to HF for any length of time I use tube equipment, if I'm 
running a net I use modern solid state equipment with DSP so I can dig the weak 
stations out of the noise. As soon as the net is over I shut off the solid 
state rig and turn on one of my sweet sounding tube rigs in order to reward and 
sooth my ears. 

Steve

J. Steven Cochrane W7JSC
  - Original Message - 
  From: Don Cunningham 
  To: Hunter Ellington ; 
drakelist@zerobeat.net 
  Sent: Saturday, February 05, 2011 4:36 PM
  Subject: Re: [Drakelist] DSP Filters


  Hunter,
  When you say that, is your usage mostly CW/Digital or SSB??  I am just 
curious, as most of the time I hear this, they really mean on CW.  If that's 
not the case, I'm interested in trying that as I LOVE the mellow sound of my 
R4(X)'s but they sometimes need just a little more help, if you know what I 
mean.
  Tks,
  Don, WB5HAK
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Re: [Drakelist] What is he best way to test the N-4B noise blanker?

[Neil (mythologics)]

From: kc9...@aol.com 

Subject: [Drakelist] What is he best way to test the N-4B noise blanker?
To: drakelist@zerobeat.net
Date: Sunday, February 6, 2011, 2:00 AM
Gang,
I need to test the noise blanker in my R-4CIs there an
easy way to test it?
No ignition noise here, no electric fences
Tried the hair dryer, and an electric drill
73,
Lee


I've had at least one cell-phone charger wall-wart that generated a 
great deal of broad-spectrum hash - some sort of switching power supply, 
I guess?


Neil
KX2Y


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[Drakelist] B-line service

[yash]

 Would like to send the B-line out for service,alignment and a good go thru. 
Can anyone recommend  someone to sent the gear to. I'm in SW Florida.
thanks
dale wt4t

 


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Re: [Drakelist] What is he best way to test the N-4B noise blanker?

[Ken Winterling]

Lee,

Wire up a relay to act like a buzzer.  That should generate some good
ignition-like sparking at the contacts.

Ken, WA2LBI


On Sun, Feb 6, 2011 at 02:00,  wrote:

> Gang,
> I need to test the noise blanker in my R-4CIs there an easy way to test
> it?
> No ignition noise here, no electric fences
> Tried the hair dryer, and an electric drill
> 73,
> Lee
>
>
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Re: [Drakelist] What is he best way to test the N-4B noise blanker?

[Ron]

I've had light dimmers provide a good bunch of gunk.  I forget if I was 
"testing" NB or DSP units with the one we had.  BTW not all light dimmers are 
bad news.  When I changed the one I reference above with a new 3-way dimmer 
switch, all the noise went away.  Package said it had a noise filter in and I 
thought, yeah sure.  Amazingly it really was quiet.

73,
Ron WD8SBB

--- On Sun, 2/6/11, kc9...@aol.com  wrote:

> From: kc9...@aol.com 
> Subject: [Drakelist] What is he best way to test the N-4B noise blanker?
> To: drakelist@zerobeat.net
> Date: Sunday, February 6, 2011, 2:00 AM
> Gang,
> I need to test the noise blanker in my R-4CIs there an
> easy way to test it?
> No ignition noise here, no electric fences
> Tried the hair dryer, and an electric drill
> 73,
> Lee
> 
> 
> 
> 
> ___
> Drakelist mailing list
> Drakelist@zerobeat.net
> http://mailman.zerobeat.net/mailman/listinfo/drakelist
> 


  

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