Re: T-4XC, R-4C, MS-4, MN-4, AC-4 Manuals
Another recommendation for Garey's CD's. They are a must have for Drake gear. He has been SK for a while now but I still miss him.
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On 1/3/2024 9:00 AM, VE7PS wrote: Matt:
I think your best source of information that goes well beyond the schematic is at K4OAH.com.? Garey is now SK (Feb 2018), but his wife?Carole is still selling Garey's "CD's", which now come as downloadable files as well.? I have had my set over 20 years and they get used often.? Garey's parts locators make finding the parts easy. His C-line "CD" includes three of four different schematics?for the R-4C. (not sure there were too many electrical?changes for the last one at 26,000 - the PTO mechanicals were changed).? Some have noted slow response to your e-mails to Carole but be patient as I believe they will still get answered.
There is no schematic I've ever seen for the MS-4 speaker - not much there to draw!
WB4HFN (at wb4hfn.com <>) has some of what you are looking for on his web site, but many are in single page downloads.? He has some full PDF's, but not too many.? Mods. dk does have some as well....but not all.
73
Peter
VE7PS
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
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Re: Replace Shure 444 Mic Cable
?
I have used Belden and Carol cables for years and have never had a problem with them.? This was in a sound reinforcement situation, stage work, outdoor events, etc.? The cables stand
up much, much better than anything Chinese or what you might get at your local music store.? It’s also less expensive, although you do have to put your own connectors on.
?
Clint, VE3CMQ
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Re: T-4XC generating unwanted tuned signal in R-4C
Rob PA9Z writes: After hours of wire tracing and elimination of possible defective component=
s, I finally ended up at a..... stupid mod made by a previous owner for wha=
tever reason.=C2=A0 One single resistor that screwed up the behaviour of va=
rious functions of the T-4XC.=C2=A0 @Gary: thanks for the tip! Oh come on! At least tell us which one it was. The suspense is killing me! :-) --lyndon
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Re: T-4XC generating unwanted tuned signal in R-4C
Very good work Rob!? Great to save another one.
I suspect that resistor was in the mixer cathode as you suspected.
I think that rig might have been used with an external transverter where they just wanted the signal, the TR switching was done in the transverter.? Or not...?
Does it also have the other normal transverter mods (screen voltage RCA jacks)?
73,
Gary
WB6OGD
?
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Re: T-4XC generating unwanted tuned signal in R-4C
*** SOLVED ***
Dears
?
After hours of wire tracing and elimination of possible defective components, I finally ended up at a..... stupid mod made by a previous owner for whatever reason.? One single resistor that screwed up the behaviour of various functions of the T-4XC.? @Gary: thanks for the tip!
?
One other beautiful Drake rig preserved for the future :)
?
73 de Rob PA9Z
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Re: T-4XC, R-4C, MS-4, MN-4, AC-4 Manuals
-WB4HFN -bama,edebris.com -rigreference.com
AND, there are Gary's CD's - very good & very reasonably priced! - I don't remember the exact web address but some of the guys here can relay the info.
Just a few...Google is your friend.? Good luck!
- Steve? W7SJT
"Always look for a positive solution then Improvise, Adapt, and Overcome" - Adaptation of the U.S. Marine Corps motto
"There are no rules here!...We're trying to accomplish something!!"
- Thomas Edison
"Success is not final, failure is not fatal.? It is the courage to continue that counts." -?Winston Churchill
On Wednesday, January 3, 2024 at 07:01:24 AM MST, Matthew VE3MXG <ve3mxg@...> wrote:
Hi All,
Does anyone know where I can download PDF versions of the manuals for the T-4XC transmitter, R-4C receiver, MS-4 speaker, MN-4 antenna match and AC-4 power supply?
73s VE3MXG
Matt
|
Group Notification writes: The following files and folders have been uploaded to the Files area of the= *Description:*
Omni VI and VI+ Inrad Roofing Filter Kit installation instructions. Please ignore me. New brain :-P
|
Re: T-4XC, R-4C, MS-4, MN-4, AC-4 Manuals
Matt:
I think your best source of information that goes well beyond the schematic is at K4OAH.com.? Garey is now SK (Feb 2018), but his wife?Carole is still selling Garey's "CD's", which now come as downloadable files as well.? I have had my set over 20 years and they get used often.? Garey's parts locators make finding the parts easy.? His C-line "CD" includes three of four different schematics?for the R-4C. (not sure there were too many electrical?changes for the last one at 26,000 - the PTO mechanicals were changed).? Some have noted slow response to your e-mails to Carole but be patient as I believe they will still get answered.??
There is no schematic I've ever seen for the MS-4 speaker - not much there to draw!
WB4HFN (at ) has some of what you are looking for on his web site, but many are in single page downloads.? He has some full PDF's, but not too many.? Mods. dk does have some as well....but not all.
73 Peter VE7PS
On Wed, Jan 3, 2024 at 6:01?AM Matthew VE3MXG < ve3mxg@...> wrote: Hi All,
Does anyone know where I can download PDF versions of the manuals for the T-4XC transmitter, R-4C receiver, MS-4 speaker, MN-4 antenna match and AC-4 power supply?
73s VE3MXG
Matt
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Re: L4B Vernier Drive - different question
While not a Drake, But has the same
effect. On my SB-220 I put those small verniers on both the Plate
and Load.
I'd hate to tune the amp without them. Even manually never mind
"By The Numbers"
Joe WB9SBD
On 1/3/2024 12:50 AM, Jim VE7RF wrote:
toggle quoted message
Show quoted text
It's too bad Drake did not use a 6:1 vernier on the LOAD
control. They also should have used a? 0-100 across the top 180
degs of the panel marking.? ?Done that way...it's just....'dial
it up by the numbers'.?
?
I came up with still another method, using those 2" diam mini
turns counters....which are marked 0-100? around their
circumference...and count up to 10 turns.
With any 6:1 vernier, it takes 3 x full revolutions? to get
from min C to max C.? That's a total of 300 increments from min
C to max C.? ?Again, just dial it up by the numbers.
IE: make up a cheat sheet for different freqs on each band.?
Makes re-tuning mere seconds.?
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Re: Replace Shure 444 Mic Cable
As to straight cable, I've used the cable from Heil with success for years.
On Wednesday, January 3, 2024 at 10:27:09 AM EST, Jim W7RY via groups.io <jimw7ry@...> wrote:
Oh... And these are straight cables.
Coiled cords are much more expensive and harder to work with.
W7RY
On 1/3/2024 9:26 AM, Jim W7RY via
groups.io wrote:
Any modern microphone cable will work fine. Its 2 conductor (red
and blue wire) with a shield. Just like the 444 stock cable. Its
also the same size.
Easiest way is to by a mic cord with XLR connectors on each end,
and simply cut them off.
Guitar center has them in stock, or ebay has 1000s of them to
choose from.? The cheap cables will work fine.
73, Jim W7RY
On 1/3/2024 9:19 AM, John N4YE wrote:
The rubber insulation is cracked. Would like to continue to use
the mic as it still has great audio. Appreciate any
recommendations on sourcing a coiled cable to match otherwise
straight cable ok.
Thanks
--
73
John?N4YE
--
Thanks and 73, Jim W7RY
--
Thanks and 73, Jim W7RY
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Re: Replace Shure 444 Mic Cable
John,
Be cautious about cheap quality import cords as well as local cords that are stiff.
73,
Evan, K9SQG
On Wednesday, January 3, 2024 at 10:19:11 AM EST, John N4YE <johnb.n4ye@...> wrote:
The rubber insulation is cracked. Would like to continue to use the mic as it still has great audio. Appreciate any recommendations on sourcing a coiled cable to match otherwise straight cable ok.
Thanks
--
73
John?N4YE
|
Re: Replace Shure 444 Mic Cable
Oh... And these are straight cables.
Coiled cords are much more expensive and harder to work with.
W7RY
On 1/3/2024 9:26 AM, Jim W7RY via
groups.io wrote:
Any modern microphone cable will work fine. Its 2 conductor (red
and blue wire) with a shield. Just like the 444 stock cable. Its
also the same size.
Easiest way is to by a mic cord with XLR connectors on each end,
and simply cut them off.
Guitar center has them in stock, or ebay has 1000s of them to
choose from.? The cheap cables will work fine.
73, Jim W7RY
On 1/3/2024 9:19 AM, John N4YE wrote:
The rubber insulation is cracked. Would like to continue to use
the mic as it still has great audio. Appreciate any
recommendations on sourcing a coiled cable to match otherwise
straight cable ok.
Thanks
--
73
John?N4YE
--
Thanks and 73, Jim W7RY
--
Thanks and 73, Jim W7RY
|
Re: Replace Shure 444 Mic Cable
Any modern microphone cable will work fine. Its 2 conductor (red and
blue wire) with a shield. Just like the 444 stock cable. Its also
the same size.
Easiest way is to by a mic cord with XLR connectors on each end, and
simply cut them off.
Guitar center has them in stock, or ebay has 1000s of them to choose
from.? The cheap cables will work fine.
73, Jim W7RY
On 1/3/2024 9:19 AM, John N4YE wrote:
The rubber insulation is cracked. Would like to continue to use
the mic as it still has great audio. Appreciate any
recommendations on sourcing a coiled cable to match otherwise
straight cable ok.
Thanks
--
73
John?N4YE
--
Thanks and 73, Jim W7RY
|
Replace Shure 444 Mic Cable
The rubber insulation is cracked. Would like to continue to use the mic as it still has great audio. Appreciate any recommendations on sourcing a coiled cable to match otherwise straight cable ok.
Thanks
--
73
John?N4YE
|
Re: T-4XC, R-4C, MS-4, MN-4, AC-4 Manuals
My favorite site is mods.dk
73
Carl - W5SU
Dallas TX
|
T-4XC, R-4C, MS-4, MN-4, AC-4 Manuals
Hi All,
Does anyone know where I can download PDF versions of the manuals for the T-4XC transmitter, R-4C receiver, MS-4 speaker, MN-4 antenna match and AC-4 power supply?
73s VE3MXG
Matt
|
Re: L4B Vernier Drive - different question
It's too bad Drake did not use a 6:1 vernier on the LOAD control. They also should have used a? 0-100 across the top 180 degs of the panel marking.? ?Done that way...it's just....'dial it up by the numbers'.?
?
I came up with still another method, using those 2" diam mini turns counters....which are marked 0-100? around their circumference...and count up to 10 turns.
With any 6:1 vernier, it takes 3 x full revolutions? to get from min C to max C.? That's a total of 300 increments from min C to max C.? ?Again, just dial it up by the numbers.
IE: make up a cheat sheet for different freqs on each band.? Makes re-tuning mere seconds.?
|
The following files and folders have been uploaded to the Files area of the [email protected] group.
By: Lyndon VE7TFX <lyndon@...>
Description:
Omni VI and VI+ Inrad Roofing Filter Kit installation instructions.
The following files and folders have been uploaded to the Files area of the [email protected] group.
By: Lyndon VE7TFX <lyndon@...>
Description:
Omni VI+ Inrad Audio Modifications
|
Re: T-4XC generating unwanted tuned signal in R-4C
Rob,
To get a signal out on the band, you do need two things.? The PTO and XTAL oscillators need to be on, and the V3 mixer needs to be on.? You
have correctly suspected these.
I don't know for sure in the T-4XC but in the T-4X, when the transceive switch is in RCVR, the power to the PTO and XTAL oscillators are turned off.
If the C is the same, that would indicate to me that the transceive switch or wiring has a problem.
The cathode of V3 is grounded by the transmit relay with the same wiper that is used for the MUTE line to the R-4.? It sounds like your cathode is always
grounded, possibly a relay or wiring problem.
Has this T-4XC ever worked for you?? If not, I'd look for suspicious mods.? It would seem odd to me to have a double failure as indicated by the above.
Does your second T-4XC work correctly?? If so, the R-4 and cables is all good.
73,
Gary
WB6OGD
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Re: T-4XC generating unwanted tuned signal in R-4C
Try adjusting the antivox gain.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
On Tuesday, January 2nd, 2024 at 7:00 PM, Rob PA9Z <pa9z.groups.io@...> wrote:
No, the rig is not transmitting - no bias current shown - it is defenitely in standby/RX mode.
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Gary WB6OGD
Rob PA9Z