I've got a friend who needs 572B's for his SB200.? ?He's ready to buy the PSVANE tubes on Amazon for $149.99/pair.??
I see that RF parts is selling Svetlana's for $200/ea. He's a SSB rag chewer so no heavy digital use.? Money is tight for him.
What's the story with 572's now???
Jim - KR9U
|
Here it is guys. Nice job Lou. Bob W4JFA?
Alek, I sent u a picture to you email. Let me know that you got it. Bob W4JFA?
Yeah. Thanks Lou. That would be great.
On 9/02/2024 7:43 pm, Louis
Parascondola via wrote:
Alek, o have to build one up for a customer who just ordered I¡¯ll
do an extra one for you while I¡¯m at it.? Lou
On
Thursday, February 8, 2024, 5:39 PM, Alek Petkovic via
<vk6apk@...> wrote:
Yeah mate. That would be grand.
Thanks. Alek.
On 8/02/2024 8:12
pm, Bob wrote:
Alek, I have one of Lou's meters in my 922.
Would you like me to send you a picture?
Bob? W4JFA
On Thu, Feb
8, 2024 at 5:35?AM Louis Parascondola via <Gudguyham= [email protected]>
wrote:
Alek, send me an email, I cloned these meters best
I could years ago. Lou?
On
Thursday, February 8, 2024, 3:39 AM, Alek Petkovic
via
<vk6apk=[email protected]>
wrote:
Does anyone know of an after market
plate current meter for the Kenwood
TL-922?
Any leads appreciated.
73, Alek VK6APK.
|
Alek, I sent u a picture to you email. Let me know that you got it. Bob W4JFA?
Yeah. Thanks Lou. That would be great.
On 9/02/2024 7:43 pm, Louis
Parascondola via wrote:
Alek, o have to build one up for a customer who just ordered I¡¯ll
do an extra one for you while I¡¯m at it.? Lou
On
Thursday, February 8, 2024, 5:39 PM, Alek Petkovic via
<vk6apk@...> wrote:
Yeah mate. That would be grand.
Thanks. Alek.
On 8/02/2024 8:12
pm, Bob wrote:
Alek, I have one of Lou's meters in my 922.
Would you like me to send you a picture?
Bob? W4JFA
On Thu, Feb
8, 2024 at 5:35?AM Louis Parascondola via <Gudguyham= [email protected]>
wrote:
Alek, send me an email, I cloned these meters best
I could years ago. Lou?
On
Thursday, February 8, 2024, 3:39 AM, Alek Petkovic
via
<vk6apk=[email protected]>
wrote:
Does anyone know of an after market
plate current meter for the Kenwood
TL-922?
Any leads appreciated.
73, Alek VK6APK.
|
Yeah. Thanks Lou. That would be great.
On 9/02/2024 7:43 pm, Louis
Parascondola via groups.io wrote:
toggle quoted message
Show quoted text
Alek, o have to build one up for a customer who just ordered I¡¯ll
do an extra one for you while I¡¯m at it. ?Lou
On
Thursday, February 8, 2024, 5:39 PM, Alek Petkovic via groups.io
<vk6apk@...> wrote:
Yeah mate. That would be grand.
Thanks. Alek.
On 8/02/2024 8:12
pm, Bob wrote:
Alek, I have one of Lou's meters in my 922.
Would you like me to send you a picture?
Bob? W4JFA
On Thu, Feb
8, 2024 at 5:35?AM Louis Parascondola via <Gudguyham= [email protected]>
wrote:
Alek, send me an email, I cloned these meters best
I could years ago. Lou?
On
Thursday, February 8, 2024, 3:39 AM, Alek Petkovic
via
<vk6apk=[email protected]>
wrote:
Does anyone know of an after market
plate current meter for the Kenwood
TL-922?
Any leads appreciated.
73, Alek VK6APK.
|
Alek, o have to build one up for a customer who just ordered I¡¯ll do an extra one for you while I¡¯m at it. ?Lou
On Thursday, February 8, 2024, 5:39 PM, Alek Petkovic via groups.io <vk6apk@...> wrote:
Yeah mate. That would be grand.
Thanks. Alek.
On 8/02/2024 8:12 pm, Bob wrote:
Alek, I have one of Lou's meters in my 922. Would
you like me to send you a picture?
Bob? W4JFA
On Thu, Feb 8, 2024 at 5:35?AM
Louis Parascondola via <Gudguyham= [email protected]>
wrote:
Alek, send me an email, I cloned these meters best I could
years ago. Lou?
On
Thursday, February 8, 2024, 3:39 AM, Alek Petkovic via <vk6apk=[email protected]>
wrote:
Does anyone know of an after market plate
current meter for the Kenwood
TL-922?
Any leads appreciated.
73, Alek VK6APK.
|
Yeah mate. That would be grand.
Thanks. Alek.
On 8/02/2024 8:12 pm, Bob wrote:
toggle quoted message
Show quoted text
Alek, I have one of Lou's meters in my 922. Would
you like me to send you a picture?
Bob? W4JFA
On Thu, Feb 8, 2024 at 5:35?AM
Louis Parascondola via <Gudguyham= [email protected]>
wrote:
Alek, send me an email, I cloned these meters best I could
years ago. Lou?
On
Thursday, February 8, 2024, 3:39 AM, Alek Petkovic via <vk6apk=[email protected]>
wrote:
Does anyone know of an after market plate
current meter for the Kenwood
TL-922?
Any leads appreciated.
73, Alek VK6APK.
|
Re: Transformer "burn-in"
That shoulda read...."Dahl did not go cheap on the insulation and used at least class B (155 deg C) or class C.
|
Alek, I have one of Lou's meters in my 922. Would you like me to send you a picture? Bob? W4JFA
On Thu, Feb 8, 2024 at 5:35?AM Louis Parascondola via <Gudguyham= [email protected]> wrote:
Alek, send me an email, I cloned these meters best I could years ago. Lou?
On Thursday, February 8, 2024, 3:39 AM, Alek Petkovic via <vk6apk=[email protected]> wrote: Does anyone know of an after market plate current meter for the Kenwood
TL-922?
Any leads appreciated.
73, Alek VK6APK.
|
OK. Thank you Yoshi.
We have a local hamfest on Saturday. I will keep my eyes open.
73, Alek VK6APK.
toggle quoted message
Show quoted text
On 8/02/2024 7:19 pm, Y. Matsuda wrote: de jh4nmt
Hi Alek
Greetings from Japan.
If you can get old TS-520, TS-530, TS-820, TS-830, solution is easy.
The meter unit is same, so replace the meter plate carefully.
In Japan, on the internet auction, such used meter unit is in
distribution enough.
Regards.
Yoshi
"Alek Petkovic via groups.io" wrote as follow;
Does anyone know of an after market plate current meter for the Kenwood
TL-922?
Any leads appreciated.
73, Alek VK6APK. ----
Y. Matsuda P.E.Jp(EE+CTM) nmt@...
|
de jh4nmt Hi Alek Greetings from Japan. If you can get old TS-520, TS-530, TS-820, TS-830, solution is easy. The meter unit is same, so replace the meter plate carefully. In Japan, on the internet auction, such used meter unit is in distribution enough. Regards. Yoshi "Alek Petkovic via groups.io" wrote as follow; Does anyone know of an after market plate current meter for the Kenwood
TL-922?
Any leads appreciated.
73, Alek VK6APK. ---- Y. Matsuda P.E.Jp(EE+CTM) nmt@...
|
Alek, send me an email, I cloned these meters best I could years ago. Lou?
On Thursday, February 8, 2024, 3:39 AM, Alek Petkovic via groups.io <vk6apk@...> wrote: Does anyone know of an after market plate current meter for the Kenwood
TL-922?
Any leads appreciated.
73, Alek VK6APK.
|
Does anyone know of an after market plate current meter for the Kenwood TL-922?
Any leads appreciated.
73, Alek VK6APK.
|
Re: GS35b 432MHz oscillating...
On Wed, Feb 7, 2024 at 08:54 PM, Dave w6de wrote:
Non Functional Gear
?
73,
Dave, w6de
"? No F#%king good" .?
?
Non functional gear is a good one.? ?Shoulda thought of it back in the 70's.? ?Used on the puritans.?
|
Re: GS35b 432MHz oscillating...
Wow. That's amazing. Glad you fixed it and thanks for reporting
back.
73, Alek, VK6APK
On 7/02/2024 10:34 pm, Tim Fern wrote:
toggle quoted message
Show quoted text
I have fixed it now, thanks.
Couldn't think what else to try, so I fitted a spare tube, cooked
it overnight with heater only, now I'm getting 1.7kW out with my
max. 70W? available drive.
It's perfectly stable and docile, just like a triode amp normally
is.
Can't imagine what the fault inside the first tube is. I've
written "NBG" all over it so it never wastes my (or anyone else's)
time again.
|
Re: GS35b 432MHz oscillating...
Non Functional Gear
?
73,
Dave, w6de
?
toggle quoted message
Show quoted text
From: [email protected]
<[email protected]> On Behalf Of Jim VE7RF via groups.io
Sent: 7 February, 2024 15:49
To: [email protected]
Subject: Re: [ham-amplifiers] GS35b 432MHz oscillating...
?
At the telco I worked for 34 years, we wrote "NFG"? on any trbl report form.? One day, some old battle axe (female trbl desk clerk, who was new at the job)? phones us up...and wants to know exactly what...'NFG' means.??
?
For the op, you might want to measure the various C values between els on the tube...on both a good tube...and the bad tube.? And perhaps hi pot test between various elements.?
|
Thanks Gentlemen
I will have a look over on those sites.
Lou if you ever have time to open one of the amps it would be interesting to get a photo of the control board and / or get the voltages on the idc connectors. Some of the voltages are missing on this control board which I believe is the source of the issue
73 Brian VE7WO
On Wed, Jan 31, 2024 at 10:53?AM Louis Parascondola via <Gudguyham= [email protected]> wrote:
I¡¯ve got three Palstar Commander amps but really haven¡¯t done much inside.? Lou?
On Wednesday, January 31, 2024, 1:04 PM, Jim VE7RF <jim.thom@...> wrote: You might want to repost this on both eham and also qrz amplifir groups.
Bill, N4ATS asked abt a commander 2500 on eham a day ago.?
?
Lou, w1qj is the go to guy for both amps.? He's on this group as well.
?
Jim? VE7RF?
|
Re: GS35b 432MHz oscillating...
:-)
It's been an eye-opener for me.
You hear rumours about variability in Russian tubes but I haven't seen it directly myself before.
The bad tube clearly has a perfect vacuum, the heater takes exactly 3A as expected, there are no internal shorts measured and it's perfectly happy at 4kV with no flashovers. I don't have a HiPot tester but I'd bet it passes.
...and yet, it's absolutely useless!
Lesson learned.
|
Re: GS35b 432MHz oscillating...
At the telco I worked for 34 years, we wrote "NFG"? on any trbl report form.? One day, some old battle axe (female trbl desk clerk, who was new at the job)? phones us up...and wants to know exactly what...'NFG' means.??
?
For the op, you might want to measure the various C values between els on the tube...on both a good tube...and the bad tube.? And perhaps hi pot test between various elements.?
|
Re: Transformer "burn-in"
?Eons ago, Dahl used to offer his ham plate xfmrs in 2 x versions, impregnated or not.? Later on, only fully impregnated versions were sold.? Too many hams were storing old amplifiers and dahl xfmrs in un heated, damp garden sheds and garages etc.?
?
When I bought my 253 lb Dahl xfmr ( $1410.00 new at the time)? around 1999 or 2000)? it was pumped full of the silicone varnish goop...done in a vacuum chamber.? The vac chamber was to get rid of any air bubbles, since air doesn't heat worth a damn, and just traps moisture. Then removed from the vac chamber, then baked in the kiln for 4 hrs.? ? Then run through a battery of various tests....like laying a dead short across the sec 1st, then applying 240 vac to the primary.?
For the OP, I would not worry abt it.? ?IF you do want to ...'pre-condition' the xfmr, the easiest way to do it is to apply low voltage AC? to the sec winding, with a small variac, with a dead short across the entire primary.? ?The pri winding is wound on the core 1st..with the sec winding on top.? ?Measure the dc resistance of the sec winding 1st. ( with pri shorted).? ?Say it's 20 ohms.? ?With 20 vac applied, u will suck 1 amp.? You can run the variac up, so the sec current is the same as max rated CCS current for the xfmr sec.? ?You will feel the xfmr get warm, normal.?
?
Dahl told me that the way he spec'd his plate xfmrs was.... it was based upon a 55 deg C temp rise over a 40 deg C ambient cabinet temp.? ?=? 95 deg C.? That's the outside surface temp.? Then add in another 10 deg C, deep inside the core....for a total core temp of 105 deg C.? ?Minimum insulation that could be used is called class A? (105 deg C rated).? Dahl did not go cheap on the insulation and used at least class B ( 55 deg C) or class C.?
?
For the OP, I would just unbox the new xfmr....and let it sit at room temp for a few days before installing.?
|
Re: GS35b 432MHz oscillating...
I have fixed it now, thanks.
Couldn't think what else to try, so I fitted a spare tube, cooked it overnight with heater only, now I'm getting 1.7kW out with my max. 70W? available drive.
It's perfectly stable and docile, just like a triode amp normally is.
Can't imagine what the fault inside the first tube is. I've written "NBG" all over it so it never wastes my (or anyone else's) time again.
|
Bob
