The very latest T-4X¡¯s have the same switch.?
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Thu, Mar 23, 2023 at 23:45, wb6ogd < garywinblad@...> wrote:
Send it to the group too.? I have a late T-4X that might be the same.
73,
Gary
WB6OGD
On 03/23/2023 8:14 PM Gary Follett <xntrick1948@...> wrote:
I have a large supply of rotary switch wafers. Can you send me a detailed, in focus photo of your switch wafer, preferably both sides?
Gary
W0DVN
On Mar 23, 2023, at 7:05 PM, W6MQI via groups.io <w6mqi@...> wrote:
I've been going through my B-line the last few weeks and have the R4B running really well such amazing audio compared to the R4C.? So next in line was the T4XB and while cleaning rotary switch contacts I noticed on the back wafer on the function switch part that rotates had a blown-out section from arching in the past. I purchased the twins from a guy about 7 or 8 years ago and never really used them they just sat on the shelf. So if anyone has a spare switch or junker T4XB I'm in the market.? ? Dammit! and I was on the home stretch to completing the B-line restoration.
Dave
... --- ... looking for a spare T4XB function switch
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C Line switch is different. The power control moved there, so I¡¯m betting that there are other differences.?
I may also have this switch in a carcass that has yielded up spare parts for me for the last 14 years.?
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Thu, Mar 23, 2023 at 23:13, W6MQI via groups.io < w6mqi@...> wrote: Peter,
?Not sure if the T4XC is the same it has a 4-wafer switch the T4XB is a 3-wafer switch.? Unfortunately not only is the contact gone, but the wiper has a big chunk missing as well
I think it's done for.
Dave
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Dave:
Wouldn't you know it's one that's buried in wiring too....makes ID pretty difficult from a picture.
Remind me again....is it a T-4X or T-4XB you need this for?? I can pull either one (or a T-4XC) to see it up close and personal, and then go looking for a suitable wafer.? It is unlikely that I have the exact switch, unless the one in the T-4XC is identical....which is a good possibility. I have a relatively?complete T-4XC parts rig on the shelf.
I'll start looking after moonset on Sunday afternoon.? I'll be chasing CY0S on 2m EME.
73 Peter VE7PS
On Thu, Mar 23, 2023 at 08:54 PM, wb6ogd wrote:
Does it look like that?
Is anyone and expert on T-4Xx mode switches?? Steve?
This one? is in a late T-4X (I think its late), Dave needs one with 3 sections like this but for his T-4XB.
73,
Gary
WB6OGD
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On 03/23/2023 9:02 PM W6MQI via <w6mqi@...> wrote:
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[Edited Message Follows]
Gary,
?Is your email on QRZ good? The function switch has three wafers it's the rear most wafer.
Dave
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Yes, that's the switch in the bottom center of the picture with the three switch wafers it's the rearmost wafer that I need.
Gary W0DVN struck out finding one in his stash of wafers?
Dave
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On Thu, Mar 23, 2023 at 08:54 PM, wb6ogd wrote:
Does it look like that?
Is anyone and expert on T-4Xx mode switches?? Steve?
This one? is in a late T-4X (I think its late), Dave needs one with 3 sections like this but for his T-4XB.
73,
Gary
WB6OGD
Show quoted text
?
On 03/23/2023 9:02 PM W6MQI via groups.io <w6mqi@...> wrote:
?
?
[Edited Message Follows]
Gary,
?Is your email on QRZ good? The function switch has three wafers it's the rear most wafer.
Dave
?
Yes, that's the switch in the bottom center of the picture with the three switch wafers it's the rearmost wafer that I need. Gary W0DVN struck out finding one in his stash of wafers? Dave
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On Thu, Mar 23, 2023 at 10:10 AM, wb6ogd wrote:
The 4 lines use the same knob setup.. except there is only one phenolic reducer.? And, it has a split in its side? so it can shrink as the screw is tightened.
Maybe you do not need 2 bushings?? Maybe they are backwards (swapped)?
And, that is the worst rusty looking switch I have seen, must need lubrication and cleaning.
73,
Gary
WB6OGD
The config in my photos is stock. The bushing on the shaft is there to isolate the mode knob from the bandwidth selector. Yes, this rig had some corrosion from humid storage. But that's merely cosmetic on the outside. All switch movement works perfectly. I got the complete 2-C, 2-NT, and 2-CQ station for a very low price. They are very early production units with serial numbers in the 40's. The 2-C had a broken crystal switch on the side, otherwise they merely needed recapping. One rectifier was bad but was easy to diagnose due to the smoke (hi). Works like a charm! ? -- 73 de Steve K9NUD .. Nothing happens until someone calls CQ!
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Dave:
Probably not the same.? I'm not at home so cannot start digging into the details.I will be home in a few days though, and can check out what parts I have/don't have and even if the switch isn't correct, there may be a wafer?that would do the job, seeing as yours sounds like it's toast.? Changing a wafer is NOT a job I'd like to do every day, but I have done it successfully on a TR-6 many moons ago and the rig is still working fine.
Can you get a good pic of the damaged wafer?? That would?help both Gary and I find you something that would "drop in"....and I use that term loosely!
73 Peter VE7PS
Peter,
?Not sure if the T4XC is the same it has a 4-wafer switch the T4XB is a 3-wafer switch.? Unfortunately not only is the contact gone, but the wiper has a big chunk missing as well
I think it's done for.
Dave
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Does it look like that?
Is anyone and expert on T-4Xx mode switches?? Steve?
This one? is in a late T-4X (I think its late), Dave needs one with 3 sections like this but for his T-4XB.
73,
Gary
WB6OGD
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On 03/23/2023 9:02 PM W6MQI via groups.io <w6mqi@...> wrote:
[Edited Message Follows] Gary,
?Is your email on QRZ good? The function switch has three wafers it's the rear most wafer.
Dave
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Send it to the group too.? I have a late T-4X that might be the same.
73,
Gary
WB6OGD
On 03/23/2023 8:14 PM Gary Follett <xntrick1948@...> wrote:
I have a large supply of rotary switch wafers. Can you send me a detailed, in focus photo of your switch wafer, preferably both sides?
Gary
W0DVN
On Mar 23, 2023, at 7:05 PM, W6MQI via groups.io <w6mqi@...> wrote:
I've been going through my B-line the last few weeks and have the R4B running really well such amazing audio compared to the R4C.? So next in line was the T4XB and while cleaning rotary switch contacts I noticed on the back wafer on the function switch part that rotates had a blown-out section from arching in the past. I purchased the twins from a guy about 7 or 8 years ago and never really used them they just sat on the shelf. So if anyone has a spare switch or junker T4XB I'm in the market.? ? Dammit! and I was on the home stretch to completing the B-line restoration.
Dave
... --- ... looking for a spare T4XB function switch
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If you think the R-4B audio is good, you should listen to an R-4A(early).
Unless.. your R-4B has the Sherwood product detector mod.
Notice how your S-meter moves on SSB signals.? If it moves up and down with sylables,
you need the Sherwood mod.
73,
Gary
WB6OGD
On 03/23/2023 8:05 PM W6MQI via groups.io <w6mqi@...> wrote:
I've been going through my B-line the last few weeks and have the R4B running really well such amazing audio compared to the R4C.? So next in line was the T4XB and while cleaning rotary switch contacts I noticed on the back wafer on the function switch part that rotates had a blown-out section from arching in the past. I purchased the twins from a guy about 7 or 8 years ago and never really used them they just sat on the shelf. So if anyone has a spare switch or junker T4XB I'm in the market.? ? Dammit! and I was on the home stretch to completing the B-line restoration.
Dave
... --- ... looking for a spare T4XB function switch
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Re: TR7A and R7A Jumper Boards and Digital Jumper Extender Board
Nice write-up. You found two of the most common TR7 failures, both on the PS board. C2108 us the only capacitor on my "must replace" list for the TR7. It is not a matter of if it fails, but rather when it fails. It lives a pretty hard life. More important than the voltage rating is to use a high quality 105C temperature rated part. I have a stash of 78L24. :) More recent thinking is that it may benefit from a reverse biased protection diode from output to input as shown on many 78xx data sheets. 73 -Jim NU0C On Thu, 23 Mar 2023 20:04:23 -0700 "n6qwhomebrew@..." <hamradiogenius@...> wrote: Follow the Schematic in the Service Manual and build one,
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See the following link for details of the display jumper board The perfboard and the 0.156 pins are bought from Mouser or Digikey. The perf board is from Vector
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TR-7 Resurrection (n6qw.com)?
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YMMV.
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73¡¯²õ
Pete N6QW
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Peter,
?Not sure if the T4XC is the same it has a 4-wafer switch the T4XB is a 3-wafer switch.? Unfortunately not only is the contact gone, but the wiper has a big chunk missing as well
I think it's done for.
I have a friend that's going to a ham swap this weekend he's also going to look for a junker T4XB so hopefully between everyone, I can get this thing fixed.
Dave
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Re: TR7A and R7A Jumper Boards and Digital Jumper Extender Board
Follow the Schematic in the Service Manual and build one, ? See the following link for details of the display jumper board The perfboard and the 0.156 pins are bought from Mouser or Digikey. The perf board is from Vector ? ? ? ? ? YMMV. ? 73¡¯²õ Pete N6QW ? Sent from for Windows ?
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From: aa5wg via groups.ioSent: Thursday, March 23, 2023 6:13 PM To: [email protected]Subject: [DRAKE-RADIO] TR7A and R7A Jumper Boards and Digital Jumper Extender Board ? Hello to all.
Does anyone know where I might find a complete set of the Jumper/Extender Boards including the Digital jumper/Extender Board for the TR7A, TR7 and R7A radios?
Thank you.
73,
Chuck
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Dave:
If Gary can't help you, I have lots of T-4XC parts that are probably the same.? Get back to me if Gary cannot help.
Even a single contact CAN be replaced, though not an easy exercise!
73 Peter VE7PS
Okay, this will take a while lots of wires to remove and label I'll send pic's tomorrow.
Thanks, Dave
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Re: DRAKE TECHNICAL NET UPDATE ( March 19, 2023 )
On Thu, Mar 23, 2023 at 01:09 PM, Mark - WB0IQK wrote:
2 pm Eastern = Vintage SSB on 14.292.5 mhz
3 pm Eastern = Heathkit net on 14.292.5 mhz
5 pm Eastern = Swan net on 14.292.5 mhz
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I wish someone would tell me why in the world ANY net for Vintage (or any other HF radio for that matter) would list a "Net" frequency on a 1/2kHz "channel"? Why exclude the vintage Marine, commercial and military and CURRENT aviation type radios (Collins HFS-900S)? radios that only tune in 1kHz steps? Asking for a friend..... ? --
73/Rick
WA6III
*Every post is created using Linux
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Okay, this will take a while lots of wires to remove and label I'll send pic's tomorrow.
Thanks, Dave
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TR7A and R7A Jumper Boards and Digital Jumper Extender Board
Hello to all.
Does anyone know where I might find a complete set of the Jumper/Extender Boards including the Digital jumper/Extender Board for the TR7A, TR7 and R7A radios?
Thank you.
73,
Chuck
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I would have a better chance of success if I could clearly see the contacts on both sides of the bad wafer.
Gary
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On Mar 23, 2023, at 8:10 PM, W6MQI via groups.io <w6mqi@...> wrote:
Do you need the switch wafer removed for pictures or just a picture of the whole switch itself mounted in the radio?
Dave
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Do you need the switch wafer removed for pictures or just a picture of the whole switch itself mounted in the radio?
Dave
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Re: Drake service CDs no longer available from K4OAH?
After reading this thread today and realizing I didn't have the docs for my 2-B, I wrote to Carol at the specified email and got a nice reply 10 minutes later ( ! ). If you go through the listings and prices and put the equipment model you want in the PayPal form, she'll know exactly what you want.
I'm using FFox 111.01. If you are having problems, they have some good security that you may have to turn off or reset. Or maybe you have a useful but annoying extension that's blocking something. Looking at you uBlock Origin.
Otherwise you could use the promiscuous Chrome, which I have banished from my Windows 11 desktop. But it probably works in almost any case (no matter what the Goog says about their security).
Charlie
WB4FAW
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W6MQI
Steve K9NUD
Gary WB6OGD
Jim Shorney
Charlie Fellenbaum - WB4FAW