Re: For Sale Beautiful 4A Line Sacramento, CA
Can these still be found??
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Tue, Mar 28, 2023 at 16:31, wb6ogd < garywinblad@...> wrote:
Steve,
Put in the Sherwood product detector mod and I bet it will improve a lot.
It did to my R-4B which is just like your 11 tuber.
The 13 tube R-4A though still has slower nicer AVC and sounds better.
73,
Gary
WB6OGD
On 03/28/2023 4:17 PM Steve Wedge, W1ES/4 via groups.io <w1es@...> wrote:
That's a nice-looking set!? I have an 11-tube set that's in that sort of shape, too. it does sound great -- even with the SS prod det.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Tuesday, March 28th, 2023 at 3:54 PM, wb6ogd <garywinblad@...> wrote:
For Sale
Almost museum quality Drake 4A line, perfect for your collection or working
station. I bought it from the original owner way back in 1980!
Very few spots on the shiny copper chassis, very few very small scratches
on the smooth black cabinets. Everything works well.
R-4A? 13 tube SN 3790
Remember, the R-4A comes with all 4 filters, Calibrator, Noise Blanker.? Tube
product detector and audio chain and the slowest AVC with the nicest audio.
Converted to the cheaper 6BZ6 RF amp (one wire change).
T-4X SN 10673
T-4X puts out 140 watts on 40m and at least 100watts on 10m.? Finals and
driver were a matched set from Drake I installed in the late '80s but I put
very low hours with careful tuning since then. The T-4X has the Drake designed
FSK mod on the PTO for old school RTTY.
MS-4 speaker with Mil-spec power supply
Power supply is custom built Mil-spec quality by the original Engineer
owner.? It makes the Drake supplies look like they were built by a 5 year old.
It was built for continuous RTTY use, it fits inside the MS-4 speaker just like
the Drake supply.
I just replaced the old tired pilot lights with LEDs so the illumination is
now nice and blue-green with matched intensity.
Comes with original manuals, QA tags, interconnection cables, receipt for
finals.? More photos or info on request.
$750 plus shipping.. or hopefully, pickup or meetup in northern CA.
73,
Gary
WB6OGD
|
Re: For Sale Beautiful 4A Line Sacramento, CA
Steve,
Put in the Sherwood product detector mod and I bet it will improve a lot.
It did to my R-4B which is just like your 11 tuber.
The 13 tube R-4A though still has slower nicer AVC and sounds better.
73,
Gary
WB6OGD
On 03/28/2023 4:17 PM Steve Wedge, W1ES/4 via groups.io <w1es@...> wrote:
That's a nice-looking set!? I have an 11-tube set that's in that sort of shape, too. it does sound great -- even with the SS prod det.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Tuesday, March 28th, 2023 at 3:54 PM, wb6ogd <garywinblad@...> wrote:
For Sale
Almost museum quality Drake 4A line, perfect for your collection or working
station. I bought it from the original owner way back in 1980!
Very few spots on the shiny copper chassis, very few very small scratches
on the smooth black cabinets. Everything works well.
R-4A? 13 tube SN 3790
Remember, the R-4A comes with all 4 filters, Calibrator, Noise Blanker.? Tube
product detector and audio chain and the slowest AVC with the nicest audio.
Converted to the cheaper 6BZ6 RF amp (one wire change).
T-4X SN 10673
T-4X puts out 140 watts on 40m and at least 100watts on 10m.? Finals and
driver were a matched set from Drake I installed in the late '80s but I put
very low hours with careful tuning since then. The T-4X has the Drake designed
FSK mod on the PTO for old school RTTY.
MS-4 speaker with Mil-spec power supply
Power supply is custom built Mil-spec quality by the original Engineer
owner.? It makes the Drake supplies look like they were built by a 5 year old.
It was built for continuous RTTY use, it fits inside the MS-4 speaker just like
the Drake supply.
I just replaced the old tired pilot lights with LEDs so the illumination is
now nice and blue-green with matched intensity.
Comes with original manuals, QA tags, interconnection cables, receipt for
finals.? More photos or info on request.
$750 plus shipping.. or hopefully, pickup or meetup in northern CA.
73,
Gary
WB6OGD
|
Re: For Sale Beautiful 4A Line Sacramento, CA
That's a nice-looking set!? I have an 11-tube set that's in that sort of shape, too. it does sound great -- even with the SS prod det.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Tuesday, March 28th, 2023 at 3:54 PM, wb6ogd <garywinblad@...> wrote:
For Sale
Almost museum quality Drake 4A line, perfect for your collection or working
station. I bought it from the original owner way back in 1980!
Very few spots on the shiny copper chassis, very few very small scratches
on the smooth black cabinets. Everything works well.
R-4A? 13 tube SN 3790
Remember, the R-4A comes with all 4 filters, Calibrator, Noise Blanker.? Tube
product detector and audio chain and the slowest AVC with the nicest audio.
Converted to the cheaper 6BZ6 RF amp (one wire change).
T-4X SN 10673
T-4X puts out 140 watts on 40m and at least 100watts on 10m.? Finals and
driver were a matched set from Drake I installed in the late '80s but I put
very low hours with careful tuning since then. The T-4X has the Drake designed
FSK mod on the PTO for old school RTTY.
MS-4 speaker with Mil-spec power supply
Power supply is custom built Mil-spec quality by the original Engineer
owner.? It makes the Drake supplies look like they were built by a 5 year old.
It was built for continuous RTTY use, it fits inside the MS-4 speaker just like
the Drake supply.
I just replaced the old tired pilot lights with LEDs so the illumination is
now nice and blue-green with matched intensity.
Comes with original manuals, QA tags, interconnection cables, receipt for
finals.? More photos or info on request.
$750 plus shipping.. or hopefully, pickup or meetup in northern CA.
73,
Gary
WB6OGD
|
Re: Problem with carrier balance pot on T-4XC
The behaviour you describe is normal for that component.? The reduction drive will continue to attempt to drive the wiper, even after it has hit its hard stop.? I hope you can get it back together again.
Also, be aware of what the procedure tells you as far as rotation of the main tuning? There are portions of the procedures where they direct you to go "up in frequency" and others where they give you clock directions (CW, CCW/ACW).
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Tuesday, March 28th, 2023 at 3:02 PM, Bill Leonard N0CU <billincolo73@...> wrote:
When I initially checked the carrier balance awhile back it looked like this pot (R21) was set correctly. Today, I attempted to do the filter match alignment (Sec 5.9 in the instruction manual). The instructions call out rotating this pot to max CCW. However, the shaft continuously rotates with no mechanical stop. I then noticed that the resistance value did not change as the shaft was rotated. I disassembled the pot to see what was wrong. The problem seems to be that the bearings don't rotate when the shaft rotates, and since the armature is connected to the shaft via the bearings, the resistance does not change. I have never seen a pot like this and wonder what it is about this circuit that required such an unusual pot? I assume that the preload needed to turn the bearings no longer exists, but I don't see any way to adjust that. Am I missing something? Can I just replace this pot with a standard 200-ohm pot (without the bearings)?
--
Bill N0CU
|
The procedures in the manuals call for each to be aligned without being connected to the other.? That is the basic alignment and, with the correct INJ cable, should work equally from the TX or RX as the frequency control.? If there are discrepancies, I would look at the cable first.? The cable material and length were chosen so that the TX and RX keep their alignment when connected together, so if you've done the alignment on both the TX and RX and the TX is giving you less sensitivity, that could indicate a bad cable.
The cables were chosen for a value of capacitance and not for impedance.? Only the INJ cable on the B and earlier sets has this spec.? All other cables can be basic audio-quality cables -- including the RX ANT.? On the C Line, the CAR OSC cable is also made for RF but I'm not certain what its spec was or is.? I've used quality coax for that cable, as the appearance of the factory cables appears to be the same as the INJ cable.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Tuesday, March 28th, 2023 at 12:06 PM, Gregg Lebovitz <gregglebovitz@...> wrote:
Hi Steve,
I have a pretty old, but original inj cable. Do the characteristics change over time? I have been aligning without the connections.
thanks,
gregg
|
Re: For Sale Beautiful 4A Line Sacramento, CA
Wow,
What a nice set! The R4A was my very first radio and it worked like a charm. These look pristine!
On Tuesday, March 28, 2023 at 03:54:34 PM EDT, wb6ogd <garywinblad@...> wrote:
For Sale
Almost museum quality Drake 4A line, perfect for your collection or working
station. I bought it from the original owner way back in 1980!
Very few spots on the shiny copper chassis, very few very small scratches
on the smooth black cabinets. Everything works well.
R-4A? 13 tube SN 3790
Remember, the R-4A comes with all 4 filters, Calibrator, Noise Blanker.? Tube
product detector and audio chain and the slowest AVC with the nicest audio.
Converted to the cheaper 6BZ6 RF amp (one wire change).
T-4X SN 10673
T-4X puts out 140 watts on 40m and at least 100watts on 10m.? Finals and
driver were a matched set from Drake I installed in the late '80s but I put
very low hours with careful tuning since then. The T-4X has the Drake designed
FSK mod on the PTO for old school RTTY.
MS-4 speaker with Mil-spec power supply
Power supply is custom built Mil-spec quality by the original Engineer
owner.? It makes the Drake supplies look like they were built by a 5 year old.
It was built for continuous RTTY use, it fits inside the MS-4 speaker just like
the Drake supply.
I just replaced the old tired pilot lights with LEDs so the illumination is
now nice and blue-green with matched intensity.
Comes with original manuals, QA tags, interconnection cables, receipt for
finals.? More photos or info on request.
$750 plus shipping.. or hopefully, pickup or meetup in northern CA.
73,
Gary
WB6OGD
|
For Sale Beautiful 4A Line Sacramento, CA
For Sale
Almost museum quality Drake 4A line, perfect for your collection or working
station. I bought it from the original owner way back in 1980!
Very few spots on the shiny copper chassis, very few very small scratches
on the smooth black cabinets. Everything works well.
R-4A? 13 tube SN 3790
Remember, the R-4A comes with all 4 filters, Calibrator, Noise Blanker.? Tube
product detector and audio chain and the slowest AVC with the nicest audio.
Converted to the cheaper 6BZ6 RF amp (one wire change).
T-4X SN 10673
T-4X puts out 140 watts on 40m and at least 100watts on 10m.? Finals and
driver were a matched set from Drake I installed in the late '80s but I put
very low hours with careful tuning since then. The T-4X has the Drake designed
FSK mod on the PTO for old school RTTY.
MS-4 speaker with Mil-spec power supply
Power supply is custom built Mil-spec quality by the original Engineer
owner.? It makes the Drake supplies look like they were built by a 5 year old.
It was built for continuous RTTY use, it fits inside the MS-4 speaker just like
the Drake supply.
I just replaced the old tired pilot lights with LEDs so the illumination is
now nice and blue-green with matched intensity.
Comes with original manuals, QA tags, interconnection cables, receipt for
finals.? More photos or info on request.
$750 plus shipping.. or hopefully, pickup or meetup in northern CA.
73,
Gary
WB6OGD
|
Re: Problem with carrier balance pot on T-4XC
And if you have ever really adjusted the null, you would know that is a VERY fine adjustment, even with the reduction drive!
73,
Gary
WB6OGD
?
|
Re: Problem with carrier balance pot on T-4XC
The carrier null is so sharp it has to be a multi turn pot. ?Rob, NC0B
toggle quoted message
Show quoted text
On Mar 28, 2023, at 1:02 PM, Bill Leonard N0CU <billincolo73@...> wrote:
?When I initially checked the carrier balance awhile back it looked like this pot (R21) was set correctly. Today, I attempted to do the filter match alignment (Sec 5.9 in the instruction manual). The instructions call out rotating this pot to
max CCW. However, the shaft continuously rotates with no mechanical stop. I then noticed that the resistance value did not change as the shaft was rotated. I disassembled the pot to see what was wrong. The problem seems to be that the bearings don't rotate
when the shaft rotates, and since the armature is connected to the shaft via the bearings, the resistance does not change. I have never seen a pot like this and wonder what it is about this circuit that required such an unusual pot? I assume that the preload
needed to turn the bearings no longer exists, but I don't see any way to adjust that. Am I missing something? Can I just replace this pot with a standard 200-ohm pot (without the bearings)?
--
Bill N0CU
|
Problem with carrier balance pot on T-4XC
When I initially checked the carrier balance awhile back it looked like this pot (R21) was set correctly. Today, I attempted to do the filter match alignment (Sec 5.9 in the instruction manual). The instructions call out rotating this pot to max CCW. However, the shaft continuously rotates with no mechanical stop. I then noticed that the resistance value did not change as the shaft was rotated. I disassembled the pot to see what was wrong. The problem seems to be that the bearings don't rotate when the shaft rotates, and since the armature is connected to the shaft via the bearings, the resistance does not change. I have never seen a pot like this and wonder what it is about this circuit that required such an unusual pot? I assume that the preload needed to turn the bearings no longer exists, but I don't see any way to adjust that. Am I missing something? Can I just replace this pot with a standard 200-ohm pot (without the bearings)?
--
Bill N0CU
|
Yes. It was installed in a L7 amplifier to prevent it from being
driven on 10-11 meters.
Not very useful I would say.... Most get tossed in the trash.. Which
they should be.
73, Jim W7RY
On 3/28/2023 10:13 AM, Jim VE7RF wrote:
What was it used for...to inhibit? amplifying > 23 mhz ???
--
Thanks and 73, Jim W7RY
|
Gregg,
If you are going to use with the T4XC, align it with it connected to the transmitter. The injection and antenna cables need to be drake spec cables. That does make a big difference overall. My R4C hears better than my Icom 7300...significantly for in the mud DX. MY R4C is the go getter for weak signal work after being fully aligned.
On Tuesday, March 28, 2023 at 12:06:44 PM EDT, Gregg Lebovitz <gregglebovitz@...> wrote:
Hi Steve,
I have a pretty old, but original inj cable. Do the characteristics change over time? I have been aligning without the connections.
thanks,
gregg
|
Thanks - I do also have a Shure 450 so I may use it instead and save the D-104 for another project.
73's
Don W.
KD4APP
toggle quoted message
Show quoted text
Probably thousands of hams have used this mic with this transceiver.? The other popular mic used is/was the Shure 444!
Lee, w0vt
On 3/28/2023 9:55 AM, Don Woodward - KD4APP wrote:
I am restoring a TR-3 and have already restored the AC-3 and purchased a nice MS-4 - I also purchased a D-104 microphone at a local hamfest recently and would like to use it with the TR-3 - has anyone used this mic with a TR-3 successfully?
Thanks in advance and 73's,
Don W.
KD4APP
|
I bought a L7 back then new and then converted it to be an export
model.? You had to change one input silver mica, re-tune it,
remove a set screw so the band switch would move to the 10 meter
position and then remove the filter which was on a PC board along
with it's attached input and out put coaxial cables.? You then put
in a new longer piece of coax connecting the amp input SO-239 to
the input of the amplifier.? Your amp was now an export model
without the 10 meter label on the band switch.
Lee, w0vt
On 3/28/2023 10:37 AM, Steve Wedge,
W1ES/4 via groups.io wrote:
toggle quoted message
Show quoted text
I
was wondering the same thing, Peter.
The
parts may be of some use in other applications.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure
email.
------- Original Message -------
On Tuesday, March 28th, 2023 at 11:32 AM, VE7PS
<ve7ps@...> wrote:
Jim:
You won't find that low pass filter board in an
"Export" (like Canada) model. It was installed in the US
models to inhibit 10m operation in a fruitless attempt by
the FCC to stop CB-ers from using ham amps back in the
late '70's and 80's. That's why on the US amps they do not
have 10m marked on the front panel. You could just short
the filter out or pull it completely and connect the
jumper.
Not sure why anyone would want to buy one?
73
Peter
VE7PS
On Tue, Mar 28, 2023 at
8:13?AM Jim VE7RF < jim.thom@...>
wrote:
What was it used for...to inhibit
amplifying > 23 mhz ??
|
Hi Steve,
I have a pretty old, but original inj cable. Do the characteristics change over time? I have been aligning without the connections.
thanks,
gregg
|
I was wondering the same thing, Peter.
The parts may be of some use in other applications.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Tuesday, March 28th, 2023 at 11:32 AM, VE7PS <ve7ps@...> wrote:
Jim:
You won't find that low pass filter board in an "Export" (like Canada) model. It was installed in the US models to inhibit 10m operation in a fruitless attempt by the FCC to stop CB-ers from using ham amps back in the late '70's and 80's. That's why on the US amps they do not have 10m marked on the front panel. You could just short the filter out or pull it completely and connect the jumper.
Not sure why anyone would want to buy one?
73 Peter VE7PS
On Tue, Mar 28, 2023 at 8:13?AM Jim VE7RF < jim.thom@...> wrote: What was it used for...to inhibit amplifying > 23 mhz ??
|
Thousands have used the D-104 with all manner of Drake tube gear.? Check to see whether or not the mic has a built-in amp, as that will be a factor in how you set it up.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Tuesday, March 28th, 2023 at 10:58 AM, Leland L. Bahr <w5drc@...> wrote:
Probably thousands of hams have used this mic with this
transceiver. The other popular mic used is/was the Shure 444!
Lee, w0vt
On 3/28/2023 9:55 AM, Don Woodward -
KD4APP wrote:
I am restoring a TR-3 and have already restored the AC-3 and
purchased a nice MS-4 - I also purchased a D-104 microphone at a
local hamfest recently and would like to use it with the TR-3 -
has anyone used this mic with a TR-3 successfully?
Thanks in advance and 73's,
Don W.
KD4APP
|
Jim:
You won't find that low pass filter board in an "Export" (like Canada) model.? It was installed in the US models to inhibit 10m operation in a fruitless attempt?by the FCC to stop CB-ers from using ham amps back in the late '70's and 80's.? That's why on the US amps they do not have 10m marked on the front panel.? You could just short the filter out or pull it completely?and connect the jumper.
Not sure why anyone would want to buy one?
73 Peter VE7PS
On Tue, Mar 28, 2023 at 8:13?AM Jim VE7RF < jim.thom@...> wrote: What was it used for...to inhibit? amplifying > 23 mhz ???
|
What was it used for...to inhibit? amplifying > 23 mhz ???
|
Probably thousands of hams have used this mic with this
transceiver.? The other popular mic used is/was the Shure 444!
Lee, w0vt
On 3/28/2023 9:55 AM, Don Woodward -
KD4APP wrote:
toggle quoted message
Show quoted text
I am restoring a TR-3 and have already restored the AC-3 and
purchased a nice MS-4 - I also purchased a D-104 microphone at a
local hamfest recently and would like to use it with the TR-3 -
has anyone used this mic with a TR-3 successfully?
Thanks in advance and 73's,
Don W.
KD4APP
|
Gary WB6OGD
Rob Sherwood