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I have spent some more time on this project since I last posted. The audio hum I mentioned before seems to have resolved itself?
as it is no longer noticeable. I guess the caps just needed more time to come back to life.?
?Power output is 100 watts on 80-10.? . Completely re-tubed, including finals, in 2016, have invoice from RF Parts, will share.?
Not many hours since. Underside of chassis looks shiny and bright, like new. Top side has a few of the blotches.
?$200 plus ship. PayPal F&F, Venmo OK. More pix available. Ships from Missoula, MT 59801. I also have an AC-4 and MS-4 which I will post on another message . If you think my price is not reasonable, I am open to suggestions. See other messages in this thread for more pix. Tom Hellem, K0SN? tel. 406-two four zero-five four two eight tom.hellem@...   
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Tom, can you post two more images, please?? One with the unit on, so we can the dial illumination, and one rear view of the radio. ? BTW, Nice sales presentation. ? Thank you. ? Joe – W7RKN From: [email protected] [mailto:[email protected]] On Behalf Of Tom Hellem
Subject: [DRAKE-RADIO] TR-4 #ForSale ? Works on both TX and RX, but not 100%. Needs some adjusting and some new caps in the RX as there is some hum. ?Output is normal on some bands and low on others. Completely re-tubed, including finals, in 2016, have invoice from RF Parts, will share.? Not many hours since. Underside of chasis looks shiny and bright, like new. Top side has a few of the blotches.
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Some blue LEDs behind the dial and meter would be sweet! And, that’s a very easily reversible mod, if you want to go back to factory.
Mark - AD7EF
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Tom, that is certainly enough information.? Cheers! --
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Thursday, February 9th, 2023 at 3:03 PM, Tom Hellem <tom.hellem@...> wrote:
 
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100 watts is not right.
Every TR-4 I have ever had and used has made close to 200 watts CW
OUT. some even a bit more.
100 watts and something isn't right.
Joe WB9SBD
On 11/30/2023 1:50 PM, Tom Hellem
wrote:
toggle quoted message
Show quoted text
[Edited Message Follows]
I have spent some more time on this project since I last
posted. The audio hum I mentioned before seems to have resolved
itself?
as it is no longer noticeable. I guess the caps just needed more
time to come back to life.?
?Power output is 100 watts on 80-10.? . Completely re-tubed,
including finals, in 2016, have invoice from RF Parts, will
share.?
Not many hours since. Underside of chassis looks shiny and
bright, like new. Top side has a few of the blotches.
?$200 plus ship. PayPal F&F, Venmo OK. More pix
available. Ships from Missoula, MT 59801. I also have an AC-4
and MS-4 which I will
post on another message . If you think my price is not
reasonable, I am open to suggestions. See other messages in this
thread for more pix.
Tom Hellem, K0SN? tel. 406-two four zero-five four two eight
tom.hellem@...
  
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170-180 out here….. ? Joe – W7RKN ? ? 100 watts is not right.
Every TR-4 I have ever had and used has made close to 200 watts CW OUT. some even a bit more.
100 watts and something isn't right.
Joe WB9SBD
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I will qualify that.
200W, on 40 & 80, into a dummy load. 180W on 20 150+ on 15 & 10.
Yes, 100W is low, especially with replaced tubes -- though 8 years is enough time to wear them out if proper precautions aren't taken.
The primary destroyer of the final tubes is driving the carp out of them all the time.? Abide by the manual's maximum plate (cathode) current recommendations, which are 300W PEP ? INPUT** on SSB and 260W INPUT?? on CW.? Given that the amp is biased AB1, assume 60% efficiency.? 260 * .6 = 156 W output.
Of course, nearly everyone runs more than that but that's what the official recommendation from Drake is and wouldn't change due to the 1kW input max vs 1500W output max that changed 40+ years ago.
FWIW
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
On Thursday, November 30th, 2023 at 4:04 PM, Joe WB9SBD <nss@...> wrote:
100 watts is not right.
Every TR-4 I have ever had and used has made close to 200 watts CW
OUT. some even a bit more.
100 watts and something isn't right.
Joe WB9SBD
On 11/30/2023 1:50 PM, Tom Hellem
wrote:
[Edited Message Follows]
I have spent some more time on this project since I last
posted. The audio hum I mentioned before seems to have resolved
itself
as it is no longer noticeable. I guess the caps just needed more
time to come back to life.
Power output is 100 watts on 80-10. . Completely re-tubed,
including finals, in 2016, have invoice from RF Parts, will
share.
Not many hours since. Underside of chassis looks shiny and
bright, like new. Top side has a few of the blotches.
$200 plus ship. PayPal F&F, Venmo OK. More pix
available. Ships from Missoula, MT 59801. I also have an AC-4
and MS-4 which I will
post on another message . If you think my price is not
reasonable, I am open to suggestions. See other messages in this
thread for more pix.
Tom Hellem, K0SN tel. 406-two four zero-five four two eight
tom.hellem@...
  
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On 2023-11-30 14:06, Steve Wedge, W1ES/4 via groups.io wrote: The primary destroyer of the final tubes is driving the carp out of
them all the time. *** I once built a linear into an ARC-5 transmitter cabinet. It had 4 6LQ6 tubes. I bought them at Radio Shack, which had a *lifetime guarantee* on their tubes. I put that Radio Shack receipt in an envelope and taped it to the bottom of the linear. ...And I sure did drive the carp out of those tubes :). - Jerry, KF6VB
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That's very true. Fish have no place in final amplifiers...
joseph n. graif
k4jng
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] < [email protected]> On Behalf Of jerry-KF6VB Sent: Thursday, November 30, 2023 6:45 PM To: [email protected]Cc: Steve Wedge, W1ES/4 via groups.io <w1es@...> Subject: Re: [DRAKE-RADIO] TR-4 #ForSale On 2023-11-30 14:06, Steve Wedge, W1ES/4 via groups.io wrote: The primary destroyer of the final tubes is driving the carp out of
them all the time. *** I once built a linear into an ARC-5 transmitter cabinet. It had 4 6LQ6 tubes. I bought them at Radio Shack, which had a *lifetime guarantee* on their tubes. I put that Radio Shack receipt in an envelope and taped it to the bottom of the linear. ...And I sure did drive the carp out of those tubes :). - Jerry, KF6VB
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I was trying for a G rating.
Pushing the output from 150W to 200W is less than 2dB but can exceed tube ratings (17.5W per tube, so 52.5W per trio)/.6 = 87.5W, continuous. So running 200+W out is likely exceeding the ratings for this tube -- even when allowing for low duty cycle.
I like to keep mine at 150 - 170W. If I need more "oomph", I have amps for that. About 400 mA or so is good.
YMMV,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with Proton Mail secure email.
toggle quoted message
Show quoted text
On Thursday, November 30th, 2023 at 6:49 PM, Joseph K4JNG <jgraif1@...> wrote: That's very true. Fish have no place in final amplifiers...
joseph n. graif
k4jng
-----Original Message-----
From: [email protected] [email protected] On Behalf Of jerry-KF6VB
Sent: Thursday, November 30, 2023 6:45 PM
To: [email protected]
Cc: Steve Wedge, W1ES/4 via groups.io w1es@...
Subject: Re: [DRAKE-RADIO] TR-4 #ForSale
On 2023-11-30 14:06, Steve Wedge, W1ES/4 via groups.io wrote:
The primary destroyer of the final tubes is driving the carp out of
them all the time.
*** I once built a linear into an ARC-5 transmitter cabinet. It had
4 6LQ6 tubes. I bought them at Radio Shack, which had a lifetime
guarantee
on their tubes. I put that Radio Shack receipt in an envelope and taped it
to the bottom of the linear.
...And I sure did drive the carp out of those tubes :).
- Jerry, KF6VB
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well keep in mind that the tubes were designed as horizontal output tubes for TV sets.? That is continuous operation.? What kills them is when you exceed what the ratings are and what the manual tells you.? Easy to do.? The few extra watts may satisfy?the mind, but does nothing at the far?end. David Assaf III W5XU, VP8RXU ?
On Thu, Nov 30, 2023 at 5:45?PM jerry-KF6VB < jerry@...> wrote: On 2023-11-30 14:06, Steve Wedge, W1ES/4 via wrote:
> The primary destroyer of the final tubes is driving the carp out of
> them all the time.
*** I once built a linear into an ARC-5 transmitter cabinet.? It had
4 6LQ6 tubes.? I bought them at Radio Shack, which had a *lifetime
guarantee*
on their tubes.? I put that Radio Shack receipt in an envelope and taped
it
to the bottom of the linear.
...And I sure did drive the carp out of those tubes :).
? ? ? ? ? ? ? ? ? ? ?- Jerry, KF6VB
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They smell bad when they get hot.
Joe WB9SBD
On 11/30/2023 5:49 PM, Joseph K4JNG
wrote:
toggle quoted message
Show quoted text
That's very true. Fish have no place in final amplifiers...
joseph n. graif
k4jng
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of jerry-KF6VB
Sent: Thursday, November 30, 2023 6:45 PM
To: [email protected]
Cc: Steve Wedge, W1ES/4 via groups.io <w1es@...>
Subject: Re: [DRAKE-RADIO] TR-4 #ForSale
On 2023-11-30 14:06, Steve Wedge, W1ES/4 via groups.io wrote:
The primary destroyer of the final tubes is driving the carp out of
them all the time.
*** I once built a linear into an ARC-5 transmitter cabinet. It had
4 6LQ6 tubes. I bought them at Radio Shack, which had a *lifetime
guarantee*
on their tubes. I put that Radio Shack receipt in an envelope and taped it
to the bottom of the linear.
...And I sure did drive the carp out of those tubes :).
- Jerry, KF6VB
|
On 2023-11-30 16:31, Joe WB9SBD wrote: They smell bad when they get hot.
*** Not at all. Especially if they're nicely breaded. - Jerry, KF6VB Joe WB9SBD
On 11/30/2023 5:49 PM, Joseph K4JNG wrote:
That's very true. Fish have no place in final amplifiers...
joseph n. graif
k4jng
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of
jerry-KF6VB
Sent: Thursday, November 30, 2023 6:45 PM
To: [email protected]
Cc: Steve Wedge, W1ES/4 via groups.io
<w1es@...>
Subject: Re: [DRAKE-RADIO] TR-4 #ForSale
On 2023-11-30 14:06, Steve Wedge, W1ES/4 via groups.io wrote:
The primary destroyer of the final tubes is driving the carp out
of
them all the time. *** I once built a linear into an ARC-5 transmitter cabinet. It had
4 6LQ6 tubes. I bought them at Radio Shack, which had a *lifetime
guarantee*
on their tubes. I put that Radio Shack receipt in an envelope and
taped it
to the bottom of the linear.
...And I sure did drive the carp out of those tubes :).
- Jerry, KF6VB Links:
------
[1] /g/DRAKE-RADIO/message/74786
[2] /mt/96853244/243852
[3] /g/DRAKE-RADIO/post
[4] /g/DRAKE-RADIO/mutehashtag/forsale
[5] /g/DRAKE-RADIO/editsub/243852
[6] /g/DRAKE-RADIO/leave/12260778/243852/767576506/xyzzy
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On 2023-11-30 16:15, David wrote: well keep in mind that the tubes were designed as horizontal output
tubes for TV sets. That is continuous operation. What kills them is
when you exceed what the ratings are and what the manual tells you.
Easy to do. The few extra watts may satisfy the mind, but does
nothing at the far end. *** That was around 1970. I was in high school. Had a lot of fun with that project, and learned a lot. Nowadays, I am much more conservative in how I treat tubes...and transistors! - Jerry, KF6VB David Assaf III
W5XU, VP8RXU
On Thu, Nov 30, 2023 at 5:45?PM jerry-KF6VB <jerry@...> wrote:
On 2023-11-30 14:06, Steve Wedge, W1ES/4 via groups.io [1] wrote:
The primary destroyer of the final tubes is driving the carp out of
them all the time. *** I once built a linear into an ARC-5 transmitter cabinet. It had
4 6LQ6 tubes. I bought them at Radio Shack, which had a *lifetime
guarantee*
on their tubes. I put that Radio Shack receipt in an envelope and
taped
it
to the bottom of the linear.
...And I sure did drive the carp out of those tubes :).
- Jerry, KF6VB Links:
------
[1]
[2] /g/DRAKE-RADIO/message/74785
[3] /mt/96853244/243852
[4] /g/DRAKE-RADIO/post
[5] /g/DRAKE-RADIO/mutehashtag/forsale
[6] /g/DRAKE-RADIO/editsub/243852
[7] /g/DRAKE-RADIO/leave/12260778/243852/767576506/xyzzy
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Sweeps were designed for pulse operation. Low average, very high peak power. That's why they can be run so hard with CW or unprocessed SSB. 73 -Jim (no fish were harmed or killed during creation of this message) NU0C On Thu, 30 Nov 2023 18:15:13 -0600 "David" <david.w5xu@...> wrote: well keep in mind that the tubes were designed as horizontal output tubes
for TV sets. That is continuous operation. What kills them is when you
exceed what the ratings are and what the manual tells you. Easy to do.
The few extra watts may satisfy the mind, but does nothing at the far end.
David Assaf III
W5XU, VP8RXU
On Thu, Nov 30, 2023 at 5:45?PM jerry-KF6VB <jerry@...> wrote:
On 2023-11-30 14:06, Steve Wedge, W1ES/4 via groups.io wrote:
The primary destroyer of the final tubes is driving the carp out of
them all the time. *** I once built a linear into an ARC-5 transmitter cabinet. It had
4 6LQ6 tubes. I bought them at Radio Shack, which had a *lifetime
guarantee*
on their tubes. I put that Radio Shack receipt in an envelope and taped
it
to the bottom of the linear.
...And I sure did drive the carp out of those tubes :).
- Jerry, KF6VB
|
Sez the guy whose call ends in “SBD” :-D
I’d actually prefer putting some prawns on top for 15 minutes.?
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
On Thu, Nov 30, 2023 at 19:31, Joe WB9SBD < nss@...> wrote:
They smell bad when they get hot.
Joe WB9SBD
On 11/30/2023 5:49 PM, Joseph K4JNG
wrote:
That's very true. Fish have no place in final amplifiers...
joseph n. graif
k4jng
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of jerry-KF6VB
Sent: Thursday, November 30, 2023 6:45 PM
To: [email protected]
Cc: Steve Wedge, W1ES/4 via groups.io <w1es@...>
Subject: Re: [DRAKE-RADIO] TR-4 #ForSale
On 2023-11-30 14:06, Steve Wedge, W1ES/4 via groups.io wrote:
The primary destroyer of the final tubes is driving the carp out of
them all the time.
*** I once built a linear into an ARC-5 transmitter cabinet. It had
4 6LQ6 tubes. I bought them at Radio Shack, which had a *lifetime
guarantee*
on their tubes. I put that Radio Shack receipt in an envelope and taped it
to the bottom of the linear.
...And I sure did drive the carp out of those tubes :).
- Jerry, KF6VB
|
Wow. A life time guarantee on 6LQ6 tubes is insane.
Doug
Free Climbing - The ultimate test of strength and endurance
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of jerry-KF6VB Sent: November 30, 2023 5:45 PM To: [email protected]Cc: Steve Wedge, W1ES/4 via groups.io Subject: Re: [DRAKE-RADIO] TR-4 #ForSale On 2023-11-30 14:06, Steve Wedge, W1ES/4 via groups.io wrote: The primary destroyer of the final tubes is driving the carp out of
them all the time. *** I once built a linear into an ARC-5 transmitter cabinet. It had 4 6LQ6 tubes. I bought them at Radio Shack, which had a *lifetime guarantee* on their tubes. I put that Radio Shack receipt in an envelope and taped it to the bottom of the linear. ...And I sure did drive the carp out of those tubes :). - Jerry, KF6VB
|
Of course, our lives went on past the life of RS.
I still encounter the occasional RS Lifetime tube. They have gold-plated pins and I have yet to find a dud from them.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with Proton Mail secure email.
toggle quoted message
Show quoted text
On Friday, December 1st, 2023 at 11:08 AM, Doug Renwick <ve5ra@...> wrote: Wow. A life time guarantee on 6LQ6 tubes is insane.
Doug
Free Climbing - The ultimate test of strength and endurance
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
jerry-KF6VB
Sent: November 30, 2023 5:45 PM
To: [email protected]
Cc: Steve Wedge, W1ES/4 via groups.io
Subject: Re: [DRAKE-RADIO] TR-4 #ForSale
On 2023-11-30 14:06, Steve Wedge, W1ES/4 via groups.io wrote:
The primary destroyer of the final tubes is driving the carp out of
them all the time.
*** I once built a linear into an ARC-5 transmitter cabinet. It had
4 6LQ6 tubes. I bought them at Radio Shack, which had a lifetime
guarantee
on their tubes. I put that Radio Shack receipt in an envelope and taped
it
to the bottom of the linear.
...And I sure did drive the carp out of those tubes :).
- Jerry, KF6VB
|
Mark Davis
Joseph K4JNG
David
Jim Shorney