I cut my teeth bringing an old Johnson Thunderbolt back from the grave.
(2) 4-400A tetrodes in parallel....learned a lot.
Key to that whole applicaiton is the neutralization....and the fact
if the gains of the tubes are so far off theres not really a perfect way to neutralize,
merely adjust the cap for "best effect" so there is no self osc, and max power out.
I believe ALL the RF transmitting tubes on the market are now made in Chyna,
and they always mass produce with sub-par materials from a "copied" sample
to cut their expenses as much as possible.
They seem to be also renumbering some tubes as "High performance",
merely giving the same tube a different part number with higher price
meanwhile theres no history of that part number tube or a datasheet.
--
Steve Hearns [ KA2PTE ]
Technotronic Dimensions, VT [USA]
WWW.TECHNOTRONIC-DIMENSIONS.COM
E-Mail: Steve@...
toggle quoted message
Show quoted text
----- Original Message ----- From: "Robin Midgett via groups.io" <RobinK4IDC@...> To: < [email protected]> Sent: Saturday, December 28, 2024 10:21 AM Subject: Re: [ham-amplifiers] Amp modification Hi Billy, I'm not an amplifier guru. I've studied & repaired a few. There's a notion in the RF amplifier camp that says "if your amplifier needs more than one tube, you need a different design." I agree with that line of thinking. If you're going to make the leap from triode to tetrode at the 400 watt /tube dissipation level, consider the 4CX400 or Russian GS-36b. They can be had for ~$100 each. Look into the mods online for the AM-6154 / AM-6155 FAA amplifiers as a starting point. Thanks, Robin Midgett K4IDC On Fri, Dec 27, 2024 at 8:03?PM Billy Pickering via groups.io <pickeringw= [email protected]> wrote: Well, I was lucky enough to pick up a Henry Tempo 2006 that did not have
any tubes. Yes, 3CX400A7 tubes are expensive so we were looking into
modifying it to run 2 or 3 4CX250B tubes instead. I know we need to have
screen power for these tubes, and was wondering if anyone was currently
making the GM3SEK tetrode control boards. I guess we could come up with
something from scratch, but those boards are really nice.
I guess if it really come down to it, we could modify to run the single
3CX800A7 we have, but not sure if the tube is any good as it was pulled
from a commercial unit.
|
I would get the 3CX800 checked out and if good go with that. Socket is the same, filament voltage would need changed and maybe the bias. That should be it. Look at all the Alpha amps that have been changed from 400 to the 800 tubes. Must be a good reason.
Hi Billy, I'm not an amplifier guru. I've studied & repaired a few. There's a notion in the RF amplifier camp that says "if your amplifier needs more than one tube, you need a different design." I agree with that line of thinking.? If you're going to make the leap from triode to tetrode at the 400 watt /tube?dissipation?level, consider the 4CX400 or Russian GS-36b. They can be had for ~$100 each. Look into the mods online for the AM-6154 / AM-6155 FAA amplifiers as a starting point.
Thanks,
Robin Midgett K4IDC
On Fri, Dec 27, 2024 at 8:03?PM Billy Pickering via <pickeringw= [email protected]> wrote: Well, I was lucky enough to pick up a Henry Tempo 2006 that did not have any tubes. Yes, 3CX400A7 tubes are expensive so we were looking into modifying it to run 2 or 3 4CX250B tubes instead. I know we need to have screen power for these tubes, and was wondering if anyone was currently making the GM3SEK tetrode control boards. I guess we could come up with something from scratch, but those boards are really nice.
?
I guess if it really come down to it, we could modify to run the single 3CX800A7 we have, but not sure if the tube is any good as it was pulled from a commercial unit.
|
Hi Billy, I'm not an amplifier guru. I've studied & repaired a few. There's a notion in the RF amplifier camp that says "if your amplifier needs more than one tube, you need a different design." I agree with that line of thinking.? If you're going to make the leap from triode to tetrode at the 400 watt /tube?dissipation?level, consider the 4CX400 or Russian GS-36b. They can be had for ~$100 each. Look into the mods online for the AM-6154 / AM-6155 FAA amplifiers as a starting point.
Thanks,
Robin Midgett K4IDC
On Fri, Dec 27, 2024 at 8:03?PM Billy Pickering via <pickeringw= [email protected]> wrote: Well, I was lucky enough to pick up a Henry Tempo 2006 that did not have any tubes. Yes, 3CX400A7 tubes are expensive so we were looking into modifying it to run 2 or 3 4CX250B tubes instead. I know we need to have screen power for these tubes, and was wondering if anyone was currently making the GM3SEK tetrode control boards. I guess we could come up with something from scratch, but those boards are really nice.
?
I guess if it really come down to it, we could modify to run the single 3CX800A7 we have, but not sure if the tube is any good as it was pulled from a commercial unit.
|
Re: TL-922 tube filament voltage.
You can buy many decent RMS multimeters like the Brymen BM857 that is a fully safety rated and protected meter that is much cheaper than the Fluke. There are others.? There is a Multimeter comparison Spreadsheet on the EEVBlog? forum.
?
Fluke is manufacturing many of its products in China and sometimes even buying a genuine Fluke product you never be sure if you getting crap from China, its a crap shoot buying Fluke products with the many fake "from same factory" products on the market. now.? In some tests that I have seen even their fuses are crap and not the proper? multimeter rated fuses that are made in Europe. Sad to see such a good brand name going "cheap made in china"
?
Henry
|
Well, I was lucky enough to pick up a Henry Tempo 2006 that did not have any tubes. Yes, 3CX400A7 tubes are expensive so we were looking into modifying it to run 2 or 3 4CX250B tubes instead. I know we need to have screen power for these tubes, and was wondering if anyone was currently making the GM3SEK tetrode control boards. I guess we could come up with something from scratch, but those boards are really nice.
?
I guess if it really come down to it, we could modify to run the single 3CX800A7 we have, but not sure if the tube is any good as it was pulled from a commercial unit.
|
Re: Tube socket for 3CX1500A7 tube-socket broken
I located? a spare Johnson #247 socket (8877). Never been soldered on.? Make offer..
Dennis, w8nw
Sorry to be a pest guys!!
?
I've become the proud owner of a Dentron DTR-2000L amp with a broken tube socket and a missing cooling fan.
This came from an estate and I'm sure that the SK was not using this amp.?
?
I could use a suggestion on a fan, as I understand that the muffin fan was NOT a good choice for a fan.
The other question is if any one here has had experience with the Chinese sockets on E-Bay.? Here's the auction number.
184967626094.? $38.50 a great price, if the thing is any good.?
?
Any thoughts would be appreciated!
?
Thanks!!!
--
Kim Herron W8ZV
|
Re: Tube socket for 3CX1500A7 tube-socket broken
On Wed, Dec 18, 2024 at 06:34 PM, Kim Herron wrote:
?
<I've become the proud owner of a Dentron DTR-2000L amp with a broken tube socket and a missing cooling fan.
<This came from an estate and I'm sure that the SK was not using this amp.?
?
<I could use a suggestion on a fan, as I understand that the muffin fan was NOT a good choice for a fan.
<The other question is if any one here has had experience with the Chinese sockets on E-Bay.? Here's the auction number.
<184967626094.? $38.50 a great price, if the thing is any good.?
?
<Any thoughts would be appreciated!
?
###? ?If I remember correctly, the 1st DTR-2000L's had this mickey mouse fan in there for cooling.? Local dealer had the 1st one in stock.? ? We all laughed when we saw the small fan...that killed sales asap.? Later units had a squirrel cage blower.? Also, I believe the fil V was on the high side on both versions.? That high fil V issue has to be addressed asap, or ur 8877 won't last.? There was no grid over current protection either..... which can save the (megabuck tube).? There was no glitch resistor in the B+....and no step start for the B+.? This is all stuff that can be sorted out... and has to be sorted out asap.? ? The HV filter caps? should probably be replaced...with 330 uf caps, or bigger.? Once that is all done, it should last.?
|
Re: Tube socket for 3CX1500A7 tube-socket broken
Ah. OK. I have gold plated ones here that I got from Mableaudio
many years ago. I know that they do silver as well.
I can add that the sockets have nice spring tension on the pins.
That goes for the 3-500Z, 811A/572B and 807 types as well.
Cheers, Alek.
On 20/12/2024 6:00 am, mike repinski
via groups.io wrote:
toggle quoted message
Show quoted text
Add says silver plated but
yes very nice looking product.
Yep. Sure is. Superb quality. Gold plated contacts
and all.
Alek
On
19/12/2024 8:09 pm, mike repinski via groups.io
wrote:
Is this socket a copy of the Johnson
socket with the same mounting hole locations? Mike
Yes. Go for it. They are good.
73, Alek VK6APK.
On
19/12/2024 1:34 am, Kim Herron wrote:
Sorry to be a pest guys!!
?
I've become the proud owner of a
Dentron DTR-2000L amp with a broken tube
socket and a missing cooling fan.
This came from an estate and I'm sure
that the SK was not using this amp.?
?
I could use a suggestion on a fan, as
I understand that the muffin fan was NOT
a good choice for a fan.
The other question is if any one here
has had experience with the Chinese
sockets on E-Bay.? Here's the auction
number.
184967626094.?
$38.50 a great price, if the thing is
any good.?
?
Any thoughts would be appreciated!
?
Thanks!!!
--
Kim Herron W8ZV
|
Re: Tube socket for 3CX1500A7 tube-socket broken
Add says silver plated but yes very nice looking product.
Yep. Sure is. Superb quality. Gold plated contacts and all.
Alek
On 19/12/2024 8:09 pm, mike repinski
via groups.io wrote:
Is this socket a copy of the
Johnson socket with the same mounting hole locations? Mike
Yes. Go for it. They are good.
73, Alek VK6APK.
On
19/12/2024 1:34 am, Kim Herron wrote:
Sorry to be a pest guys!!
?
I've become the proud owner of a Dentron
DTR-2000L amp with a broken tube socket and a
missing cooling fan.
This came from an estate and I'm sure that the SK
was not using this amp.?
?
I could use a suggestion on a fan, as I
understand that the muffin fan was NOT a good choice
for a fan.
The other question is if any one here has had
experience with the Chinese sockets on E-Bay.?
Here's the auction number.
184967626094.?
$38.50 a great price, if the thing is any good.?
?
Any thoughts would be appreciated!
?
Thanks!!!
--
Kim Herron W8ZV
|
Re: Tube socket for 3CX1500A7 tube-socket broken
Yep. Sure is. Superb quality. Gold plated contacts and all.
Alek
On 19/12/2024 8:09 pm, mike repinski
via groups.io wrote:
toggle quoted message
Show quoted text
Is this socket a copy of the
Johnson socket with the same mounting hole locations? Mike
Yes. Go for it. They are good.
73, Alek VK6APK.
On
19/12/2024 1:34 am, Kim Herron wrote:
Sorry to be a pest guys!!
?
I've become the proud owner of a Dentron
DTR-2000L amp with a broken tube socket and a
missing cooling fan.
This came from an estate and I'm sure that the SK
was not using this amp.?
?
I could use a suggestion on a fan, as I
understand that the muffin fan was NOT a good choice
for a fan.
The other question is if any one here has had
experience with the Chinese sockets on E-Bay.?
Here's the auction number.
184967626094.?
$38.50 a great price, if the thing is any good.?
?
Any thoughts would be appreciated!
?
Thanks!!!
--
Kim Herron W8ZV
|
Re: Tube socket for 3CX1500A7 tube-socket broken
The porcelain part of the socket are cheap at hamfest, Johnson 273 I believe. ?It gets expensive with the copper grid tabs.
On Thursday, December 19, 2024, 7:09 AM, mike repinski via groups.io <mikflathead@...> wrote:
Is this socket a copy of the Johnson socket with the same mounting hole locations? Mike
Yes. Go for it. They are good.
73, Alek VK6APK.
On 19/12/2024 1:34 am, Kim Herron
wrote:
Sorry to be a pest guys!!
?
I've become the proud owner of a Dentron DTR-2000L amp with a
broken tube socket and a missing cooling fan.
This came from an estate and I'm sure that the SK was not
using this amp.?
?
I could use a suggestion on a fan, as I understand that the
muffin fan was NOT a good choice for a fan.
The other question is if any one here has had experience with
the Chinese sockets on E-Bay.? Here's the auction number.
184967626094.?
$38.50 a great price, if the thing is any good.?
?
Any thoughts would be appreciated!
?
Thanks!!!
--
Kim Herron W8ZV
|
Re: Tube socket for 3CX1500A7 tube-socket broken
Is this socket a copy of the Johnson socket with the same mounting hole locations? Mike
Yes. Go for it. They are good.
73, Alek VK6APK.
On 19/12/2024 1:34 am, Kim Herron
wrote:
Sorry to be a pest guys!!
?
I've become the proud owner of a Dentron DTR-2000L amp with a
broken tube socket and a missing cooling fan.
This came from an estate and I'm sure that the SK was not
using this amp.?
?
I could use a suggestion on a fan, as I understand that the
muffin fan was NOT a good choice for a fan.
The other question is if any one here has had experience with
the Chinese sockets on E-Bay.? Here's the auction number.
184967626094.?
$38.50 a great price, if the thing is any good.?
?
Any thoughts would be appreciated!
?
Thanks!!!
--
Kim Herron W8ZV
|
Re: Tube socket for 3CX1500A7 tube-socket broken
Yes. Go for it. They are good.
73, Alek VK6APK.
On 19/12/2024 1:34 am, Kim Herron
wrote:
toggle quoted message
Show quoted text
Sorry to be a pest guys!!
?
I've become the proud owner of a Dentron DTR-2000L amp with a
broken tube socket and a missing cooling fan.
This came from an estate and I'm sure that the SK was not
using this amp.?
?
I could use a suggestion on a fan, as I understand that the
muffin fan was NOT a good choice for a fan.
The other question is if any one here has had experience with
the Chinese sockets on E-Bay.? Here's the auction number.
184967626094.?
$38.50 a great price, if the thing is any good.?
?
Any thoughts would be appreciated!
?
Thanks!!!
--
Kim Herron W8ZV
|
Re: TL-922 tube filament voltage.
Fluke 87's and 88's fall in to that class.
Kim Herron W8ZV kim.herron@... 1-616-677-3706
On Wednesday, December 18, 2024 at 04:28:48 PM EST, Walter via groups.io <kr4hv@...> wrote:
The meter one uses for AC mains or any AC measurements should be a TRUE RMS reading meter to be accurate.?
?
Many of the higher quality Fluke
?meters (read higher priced ones) are True RMS reading AC meters but not all Flukes are.
?
There are other brands that are as well.?
If they are the spec will say so.
?
73,
?
Walter
?
?
?
From: [email protected]
<[email protected]> On Behalf Of Bob via groups.io
Sent: 18 December, 2024 8:10 AM
To: [email protected]
Subject: Re: [ham-amplifiers] TL-922 tube filament voltage.
?
Lou, That's pretty lucky. I should check mine. The transformer for my house is on the pole at the street in front of my house ,about 100 feet away from the house.
?
On Wed, Dec 18, 2024 at 5:22?AM Louis Parascondola via <Gudguyham=[email protected]> wrote:
Right, the guy said he used a Flike.? With line voltage at 252 I¡¯d be concerned about lots of things in my house.? I¡¯m lucky, I have a transformer for my house just for me!!
?
On Tuesday, December 17, 2024, 2:34 PM, Bob via
<W4JFABob=[email protected]> wrote:
Lou, Good point on the meter. In the past if you talk to any electrical company about voltage they'll ask you "what meter are you using"?
?
On Tue, Dec 17, 2024 at 2:02?PM Louis Parascondola via <Gudguyham=[email protected]> wrote:
Updating a service really doesn¡¯t raise the actual voltage coming into your house.? The only thing upgrading does is increase the potential current available to you.? With no load on your service the voltage
should not have changed.? I would make sure you use a good meter to be sure your voltage is actually as high as 250! ? ?Generally line voltage of around 244 or less does not require any intervention on filament voltage adjustment.? Before I did anything to
adjust filament voltage I would make definitely sure that at the pins the voltage was more than 5.3volts.? You definitely do not want less than 5 volts. ?
?
On Tuesday, December 17, 2024, 12:28 PM, Kim Herron <w8zv@...> wrote:
I've appreciated all the info that I've gotten on the Kenwood TL-922A and I've ordered the relay switching board from Harbach.? While I'm in there, I'd like to address the filament voltage.? I've looked? for info on how I might do that,
but I'm not finding what I want.? Is there an easy way to do this that has been done and I can get the docs on??? Any info would be appreciated.? BTW, I've had my electrical service here upgraded and my line voltage here measures around 250 VAC.? So that filament
voltage SHOULD be addressed.
|
Re: Tube socket for 3CX1500A7 tube-socket broken
I've heard that saying somewhat modified:? "A waist is a terrible thing to mind".? That's for? those of us who've had a couple cold 807's too many.? It's OK.? You're in good company.? Me done same ting.
Kim Herron W8ZV kim.herron@... 1-616-677-3706
On Wednesday, December 18, 2024 at 04:12:24 PM EST, Mike Sawyer via groups.io <w3slk@...> wrote:
Yeah, ????????? Nothing like making a complete fool of yourself! I stand corrected. It was doing a google search and scanned at the specs of the DTR-1200L. ????????? A mind is a terrible thing when it is wasted! ? Mod-U-Lator, Mike(y)/W3SLK ? ? ?
From: [email protected] [mailto:[email protected]] On Behalf Of Kim Herron
Sent: Wednesday, December 18, 2024 3:43 PM
To: [email protected]
Subject: Re: [ham-amplifiers] Tube socket for 3CX1500A7 tube-socket broken ? According to the manual the DTR-2000L has one 3CX1500A7.? Are you thinking of the DTR-1000L? Kim Herron W8ZV kimherron@... 1-616-677-3706 On Wednesday, December 18, 2024 at 12:54:42 PM EST, Mike Sawyer via groups.io <w3slk@...> wrote: Excuse me for asking but I thought the DTR-2000L had 572B¡¯s and not an 8877? ? Mod-U-Lator, Mike(y)/W3SLK ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Kim Herron
Sent: Wednesday, December 18, 2024 12:34 PM
To: [email protected]
Subject: [ham-amplifiers] Tube socket for 3CX1500A7 tube-socket broken ? Sorry to be a pest guys!! I've become the proud owner of a Dentron DTR-2000L amp with a broken tube socket and a missing cooling fan. This came from an estate and I'm sure that the SK was not using this amp.? I could use a suggestion on a fan, as I understand that the muffin fan was NOT a good choice for a fan. The other question is if any one here has had experience with the Chinese sockets on E-Bay.? Here's the auction number. 184967626094.? $38.50 a great price, if the thing is any good.? Any thoughts would be appreciated!
|
Re: TL-922 tube filament voltage.
The meter one uses for AC mains or any AC measurements should be a TRUE RMS reading meter to be accurate.?
?
Many of the higher quality Fluke
?meters (read higher priced ones) are True RMS reading AC meters but not all Flukes are.
?
There are other brands that are as well.?
If they are the spec will say so.
?
73,
?
Walter
?
?
?
toggle quoted message
Show quoted text
From: [email protected]
<[email protected]> On Behalf Of Bob via groups.io
Sent: 18 December, 2024 8:10 AM
To: [email protected]
Subject: Re: [ham-amplifiers] TL-922 tube filament voltage.
?
Lou, That's pretty lucky. I should check mine. The transformer for my house is on the pole at the street in front of my house ,about 100 feet away from the house.
?
On Wed, Dec 18, 2024 at 5:22?AM Louis Parascondola via <Gudguyham=[email protected]> wrote:
Right, the guy said he used a Flike.? With line voltage at 252 I¡¯d be concerned about lots of things in my house.? I¡¯m lucky, I have a transformer for my house just for me!!
?
On Tuesday, December 17, 2024, 2:34 PM, Bob via
<W4JFABob=[email protected]> wrote:
Lou, Good point on the meter. In the past if you talk to any electrical company about voltage they'll ask you "what meter are you using"?
?
On Tue, Dec 17, 2024 at 2:02?PM Louis Parascondola via <Gudguyham=[email protected]> wrote:
Updating a service really doesn¡¯t raise the actual voltage coming into your house.? The only thing upgrading does is increase the potential current available to you.? With no load on your service the voltage
should not have changed.? I would make sure you use a good meter to be sure your voltage is actually as high as 250! ? ?Generally line voltage of around 244 or less does not require any intervention on filament voltage adjustment.? Before I did anything to
adjust filament voltage I would make definitely sure that at the pins the voltage was more than 5.3volts.? You definitely do not want less than 5 volts. ?
?
On Tuesday, December 17, 2024, 12:28 PM, Kim Herron <w8zv@...> wrote:
I've appreciated all the info that I've gotten on the Kenwood TL-922A and I've ordered the relay switching board from Harbach.? While I'm in there, I'd like to address the filament voltage.? I've looked? for info on how I might do that,
but I'm not finding what I want.? Is there an easy way to do this that has been done and I can get the docs on??? Any info would be appreciated.? BTW, I've had my electrical service here upgraded and my line voltage here measures around 250 VAC.? So that filament
voltage SHOULD be addressed.
|
Re: Smoker contamination removal
When I worked at a office equipment repair department, we used simple green (a common cleaner here in the mid-west), to clean the copiers and fax machines with. sprayed it on and the smoke residue ran of in streams. The cases of the machines were made of plastic and cleaned up nicely. I would recommend you try it on a small out of the way spot first.
?
Good luck,
N0NC
Chuck
|
Re: Tube socket for 3CX1500A7 tube-socket broken
Yeah, ????????? Nothing like making a complete fool of yourself! I stand corrected. It was doing a google search and scanned at the specs of the DTR-1200L. ????????? A mind is a terrible thing when it is wasted! ? Mod-U-Lator, Mike(y)/W3SLK ? ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Kim Herron
Sent: Wednesday, December 18, 2024 3:43 PM
To: [email protected]
Subject: Re: [ham-amplifiers] Tube socket for 3CX1500A7 tube-socket broken? According to the manual the DTR-2000L has one 3CX1500A7.? Are you thinking of the DTR-1000L? Kim Herron W8ZV kimherron@... 1-616-677-3706 On Wednesday, December 18, 2024 at 12:54:42 PM EST, Mike Sawyer via groups.io <w3slk@...> wrote: Excuse me for asking but I thought the DTR-2000L had 572B¡¯s and not an 8877? ? Mod-U-Lator, Mike(y)/W3SLK ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Kim Herron
Sent: Wednesday, December 18, 2024 12:34 PM
To: [email protected]
Subject: [ham-amplifiers] Tube socket for 3CX1500A7 tube-socket broken ? Sorry to be a pest guys!! I've become the proud owner of a Dentron DTR-2000L amp with a broken tube socket and a missing cooling fan. This came from an estate and I'm sure that the SK was not using this amp.? I could use a suggestion on a fan, as I understand that the muffin fan was NOT a good choice for a fan. The other question is if any one here has had experience with the Chinese sockets on E-Bay.? Here's the auction number. 184967626094.? $38.50 a great price, if the thing is any good.? Any thoughts would be appreciated!
|
Re: Tube socket for 3CX1500A7 tube-socket broken
According to the manual the DTR-2000L has one 3CX1500A7.? Are you thinking of the DTR-1000L?
Kim Herron W8ZV kim.herron@... 1-616-677-3706
On Wednesday, December 18, 2024 at 12:54:42 PM EST, Mike Sawyer via groups.io <w3slk@...> wrote:
Excuse me for asking but I thought the DTR-2000L had 572B¡¯s and not an 8877? ? Mod-U-Lator, Mike(y)/W3SLK ? ? ?
From: [email protected] [mailto:[email protected]] On Behalf Of Kim Herron
Sent: Wednesday, December 18, 2024 12:34 PM
To: [email protected]
Subject: [ham-amplifiers] Tube socket for 3CX1500A7 tube-socket broken ? Sorry to be a pest guys!! I've become the proud owner of a Dentron DTR-2000L amp with a broken tube socket and a missing cooling fan. This came from an estate and I'm sure that the SK was not using this amp.? I could use a suggestion on a fan, as I understand that the muffin fan was NOT a good choice for a fan. The other question is if any one here has had experience with the Chinese sockets on E-Bay.? Here's the auction number. 184967626094.? $38.50 a great price, if the thing is any good.? Any thoughts would be appreciated!
|
Re: Tube socket for 3CX1500A7 tube-socket broken
Excuse me for asking but I thought the DTR-2000L had 572B¡¯s and not an 8877? ? Mod-U-Lator, Mike(y)/W3SLK ? ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Kim Herron
Sent: Wednesday, December 18, 2024 12:34 PM
To: [email protected]
Subject: [ham-amplifiers] Tube socket for 3CX1500A7 tube-socket broken ? Sorry to be a pest guys!! I've become the proud owner of a Dentron DTR-2000L amp with a broken tube socket and a missing cooling fan. This came from an estate and I'm sure that the SK was not using this amp.? I could use a suggestion on a fan, as I understand that the muffin fan was NOT a good choice for a fan. The other question is if any one here has had experience with the Chinese sockets on E-Bay.? Here's the auction number. 184967626094.? $38.50 a great price, if the thing is any good.? Any thoughts would be appreciated!
|
Technotronic Dimensions
Robin Midgett
