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Re: Tube socket for 3CX1500A7 tube-socket broken
On Wed, Dec 18, 2024 at 06:34 PM, Kim Herron wrote:
###? ?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.? |
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Re: Tube socket for 3CX1500A7 tube-socket broken
¿ªÔÆÌåÓýAh. 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:
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Re: Tube socket for 3CX1500A7 tube-socket broken
Add says silver plated but yes very nice looking product.
On Thursday, December 19, 2024 at 04:53:32 PM EST, Alek Petkovic via groups.io <vk6apk@...> wrote:
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
On Wednesday,
December 18, 2024 at 06:13:13 PM EST, Alek Petkovic via
groups.io <vk6apk@...> wrote:
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
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Re: Tube socket for 3CX1500A7 tube-socket broken
¿ªÔÆÌåÓýYep. Sure is. Superb quality. Gold plated contacts and all. Alek On 19/12/2024 8:09 pm, mike repinski
via groups.io wrote:
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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.
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On Thursday, December 19, 2024, 7:09 AM, mike repinski via groups.io <mikflathead@...> wrote:
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Re: Tube socket for 3CX1500A7 tube-socket broken
Is this socket a copy of the Johnson socket with the same mounting hole locations? Mike
On Wednesday, December 18, 2024 at 06:13:13 PM EST, Alek Petkovic via groups.io <vk6apk@...> wrote:
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
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Re: Tube socket for 3CX1500A7 tube-socket broken
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Re: TL-922 tube filament voltage.
Kim Herron
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. Bob W4JFA ? On Wed, Dec 18, 2024 at 5:22?AM Louis Parascondola via <Gudguyham=[email protected]> wrote:
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Re: Tube socket for 3CX1500A7 tube-socket broken
Kim Herron
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 ? 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 w8zv@... |
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Re: TL-922 tube filament voltage.
¿ªÔÆÌåÓýThe 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. Bob W4JFA ? On Wed, Dec 18, 2024 at 5:22?AM Louis Parascondola via <Gudguyham=[email protected]> wrote:
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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.
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Good luck,
N0NC
Chuck |
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Re: Tube socket for 3CX1500A7 tube-socket broken
¿ªÔÆÌåÓýYeah, ????????? 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 ? 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 w8zv@... |
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Re: Tube socket for 3CX1500A7 tube-socket broken
Kim Herron
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 ? 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 w8zv@... |
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Re: Tube socket for 3CX1500A7 tube-socket broken
¿ªÔÆÌåÓýExcuse 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 ? 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 w8zv@... |
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Re: Tube socket for 3CX1500A7 tube-socket broken
I have good johnson sockets for 8877's. Mike
On Wednesday, December 18, 2024 at 12:34:05 PM EST, Kim Herron <w8zv@...> 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
w8zv@...
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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!
?
Thanks!!!
--
Kim Herron W8ZV
w8zv@... |
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Re: TL-922 tube filament voltage.
Hi,
?
The measured AC voltage of the 3-500Z tubes in the TL-922A as measured at the tube pins was a bit high in my amplifier, about 5.4 volts. Adding a CL-80 current limiter in series with each of the primary 0 volt lead of the filament transformer dropped the voltage to 5.1 volts in my amplifier. A side benefit is that the startup peak current is limited, helping to extend tube life. Mount the CL-80 away from nearby components as they get hot. The CL-80 is available from RF Parts or eBay.
?
I have some other TL-922 mods on my web site, .
?
73,
?
Jack, WB8BFS
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Re: TL-922 tube filament voltage.
That sounds like its a bit high until you figure that lots of our gear was designed around 117 volts nominal +/- 10 percent.? At + 10 percent 129 VAC COULD be considered within spec.? My voltage here varies 2 to 3 volts and the higher voltage shows up with no or light load.? The guys at Consumers Power tell me that they shoot for 123 to 125 VAC.? That would make a single phase service to a house between 246 to 250.? I've never lost anything here to overvoltage.? I have had things go away because of momentary on and off situations caused by trees in the lines and blowing line fuses.? Consumers paid for a new washer once due to that.?
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Back to this original discussion, i.e. 5 volt filaments on 3-500 tubes:? In my mind it would've made more sense to have adjustable primary taps on the transformer so you get closer to the 5 volts.? But in engineering for the end user, everything is a trade-off.?
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Kim Herron W8ZV
w8zv@... |
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Re: 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. Bob W4JFA On Wed, Dec 18, 2024 at 5:22?AM Louis Parascondola via <Gudguyham=[email protected]> wrote:
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Re: TL-922 tube filament voltage.
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!!
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On Tuesday, December 17, 2024, 2:34 PM, Bob via groups.io <W4JFABob@...> wrote:
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Bob