[Boatanchors] power tubes

bonddaleena at aol.com bonddaleena at aol.com
Wed Feb 4 21:33:56 EST 2009 


Hi gang. Back in the late 60's I had just been discharged from the US 
Navy and started work at a local steel mill back in Fitchburg, Mass. I 
had been a Novice at 13 and got my General while 'deployed'.
Anyway, one day I was watching a Technician for a company whose 
machinery we used. We made saw blades, from hacksaw blades to 10 foot 
circular, replaceable tooth blades.
This particular machine was in the hacksaw blade area. It was a BIG 
induction hardener.
I asked the Tech what he was doing and he explained he was not doing a 
repair, just some routine PM.
AS part of the PM, he was replacing a BUNCH of tubes. I asked him if 
they were any good. "Fine" was his reply, but they change them every so 
many hours, since that was cheaper than a service call.
I asked him for the tubes and he gave me a whole box of them. Guess 
what? 3-500Zs, and Eimac to boot! I had no real use for them, but being 
an incurable packrat, I took them.
I gave some to a buddy of mine, K1DPP (who I believe is a SK). He 
designed and built a 6 Meter amp using one of those tubes and it was in 
The Handbook" one year.
Alas, I put myself through College shortly there after and worked at 
IBM for 27 1/2 years.

You just DO NOT want to hear about some of the Navy gear I acquired 
just before I was discharged !!!!
Ever wonder why our taxes are so high? ha ha

73
ron
N4UE


-----Original Message-----
From: boatanchors-request at mailman.qth.net
To: boatanchors at mailman.qth.net
Sent: Wed, 4 Feb 2009 7:22 pm
Subject: Boatanchors Digest, Vol 61, Issue 8



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Today's Topics:

1. Re: Interesting place to find HV and amp parts . . .
(david freeman)
2. Re: Interesting place to find HV and amp parts . . . (Jerry K)
3. Re: Interesting place to find HV and amp parts . . .
(Bob Hardie- W5UQ)
4. Re: Interesting place to find HV and amp parts . . . (Revcom)
5. Re: Interesting place to find HV and amp parts . . .
(James M. Walker)


----------------------------------------------------------------------

Message: 1
Date: Wed, 4 Feb 2009 18:02:08 -0500
From: "david freeman" <_dave.f at mail.com>
Subject: Re: [Boatanchors] Interesting place to find HV and amp parts
. . .
To: boatanchors at mailman.qth.net
Message-ID: <20090204230208.46C0F326774 at ws1-8.us4.outblaze.com>
Content-Type: text/plain; charset="iso-8859-1"

My sister and her husband own and tent/awning shop. They use a number 
of RF
seemers to melt the vinyl canvas together. The two pieces of vinyl are 
smashed
between two aluminum bars about 18" long. The bars serve as part of the
capacitance in the tank circuit (I think). I look at their machinery 
and see
some pretty heavy duty parts that would easily make a multi-kW rig.

Dave, WW8S
> ----- Original Message -----
> From: butwheat <butwheat73 at gmail.com>
> To: boatanchors at mailman.qth.net
> Subject: [Boatanchors] Interesting place to find HV and amp parts . . 
.
> Date: Wed, 4 Feb 2009 10:16:50 -0500
>
>
> Strange place to find these parts:
>
> http://www.landlmachinery.com/Parts.html
>
> HTH es 73 de Mark KX8XX
> ...-.-
>
> .
>
> .
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
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Message: 2
Date: Wed, 04 Feb 2009 17:15:18 -0600
From: Jerry K <w5kp at hughes.net>
Subject: Re: [Boatanchors] Interesting place to find HV and amp parts
. . .
To: david freeman <_dave.f at mail.com>
Cc: boatanchors at mailman.qth.net
Message-ID: <498A2186.5060104 at hughes.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Wonder how many points it's worth on Field Day to build your own
operating tent on site and then transmit with the machinery you used to
build it?
W5KP


david freeman wrote:
> My sister and her husband own and tent/awning shop. They use a number 
of RF
seemers to melt the vinyl canvas together. The two pieces of vinyl are 
smashed
between two aluminum bars about 18" long. The bars serve as part of the
capacitance in the tank circuit (I think). I look at their machinery 
and see
some pretty heavy duty parts that would easily make a multi-kW rig.
>
> Dave, WW8S
>
>


------------------------------

Message: 3
Date: Wed, 04 Feb 2009 18:34:41 -0500
From: Bob Hardie- W5UQ <W5UQ at verizon.NET>
Subject: Re: [Boatanchors] Interesting place to find HV and amp parts
. . .
To: david freeman <_dave.f at mail.com>
Cc: boatanchors at mailman.qth.net
Message-ID: <498A2611.9030706 at verizon.NET>
Content-Type: text/plain; charset="iso-8859-1"

I used to work and maintain one of those transmitters... I mean seam
sealers.

A "Tent and Awning" company in Tulsa asked me to come out and look at
their splicer. I was saying, "what????" Well, I was a consulting
engineer and decided to go look. This was in the 80's. When I got
there I found basically an AM transmitter that caused enough RF in the
BIG BAR that was several feet long, that it melted the plastic, or
whatever materials, together. I fixed the transmitter and it worked.
I have to admit that this was, at first thought, strange. But it turned
out to be "simple"..... A transmitter to splice material together???? 
oh
well.......

Live and learn...
Bob W5UQ

david freeman wrote:
> My sister and her husband own and tent/awning shop. They use a number 
of RF
seemers to melt the vinyl canvas together. The two pieces of vinyl are 
smashed
between two aluminum bars about 18" long. The bars serve as part of the
capacitance in the tank circuit (I think). I look at their machinery 
and see
some pretty heavy duty parts that would easily make a multi-kW rig.
>
> Dave, WW8S
>
>> ----- Original Message -----
>> From: butwheat <butwheat73 at gmail.com>
>> To: boatanchors at mailman.qth.net
>> Subject: [Boatanchors] Interesting place to find HV and amp parts . 
. .
>> Date: Wed, 4 Feb 2009 10:16:50 -0500
>>
>>
>> Strange place to find these parts:
>>
>> http://www.landlmachinery.com/Parts.html
>>
>> HTH es 73 de Mark KX8XX
>> ...-.-
>>
>> .
>>
>> .
>> ______________________________________________________________
>> Boatanchors mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Boatanchors at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
>
>
>
>
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Message: 4
Date: Wed, 4 Feb 2009 17:50:45 -0600
From: "Revcom" <revcom at wbsnet.org>
Subject: Re: [Boatanchors] Interesting place to find HV and amp parts
. . .
To: "Bob Hardie- W5UQ" <W5UQ at verizon.NET>, "david freeman"
<_dave.f at mail.com>
Cc: boatanchors at mailman.qth.net
Message-ID: <DE30C85A78654ECEB3D216371F61E96F at ROD>
Content-Type: text/plain; charset="iso-8859-1"

What do those things run on? 10 something MHz? Big MRI transmitter, er
scanner, at regional Hosp
runs at 25.407Mhz, lotsa watts.

Rod
K0EQH

----- Original Message -----
From: Bob Hardie- W5UQ
To: david freeman
Cc: boatanchors at mailman.qth.net
Sent: Wednesday, February 04, 2009 5:34 PM
Subject: Re: [Boatanchors] Interesting place to find HV and amp parts . 
. .


I used to work and maintain one of those transmitters... I mean seam 
sealers.


A "Tent and Awning" company in Tulsa asked me to come out and look at 
their
splicer. I was saying, "what????" Well, I was a consulting engineer and
decided to go look. This was in the 80's. When I got there I found 
basically
an AM transmitter that caused enough RF in the BIG BAR that was several 
feet
long, that it melted the plastic, or whatever materials, together. I 
fixed the
transmitter and it worked.
I have to admit that this was, at first thought, strange. But it turned 
out
to be "simple"..... A transmitter to splice material together???? oh 
well.......

Live and learn...
Bob W5UQ

david freeman wrote:
My sister and her husband own and tent/awning shop. They use a number 
of RF
seemers to melt the vinyl canvas together. The two pieces of vinyl are 
smashed
between two aluminum bars about 18" long. The bars serve as part of the
capacitance in the tank circuit (I think). I look at their machinery 
and see
some pretty heavy duty parts that would easily make a multi-kW rig.

Dave, WW8S
----- Original Message -----
From: butwheat <butwheat73 at gmail.com>
To: boatanchors at mailman.qth.net
Subject: [Boatanchors] Interesting place to find HV and amp parts . . .
Date: Wed, 4 Feb 2009 10:16:50 -0500


Strange place to find these parts:

http://www.landlmachinery.com/Parts.html

HTH es 73 de Mark KX8XX
...-.-

.

.
______________________________________________________________
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------------------------------

Message: 5
Date: Wed, 4 Feb 2009 19:22:49 -0500
From: "James M. Walker" <chejmw at buffalo.edu>
Subject: Re: [Boatanchors] Interesting place to find HV and amp parts
. . .
To: <boatanchors at mailman.qth.net>
Message-ID: <80EDA84AF7FF494C8F922E5F978B614F at ESHOP1>
Content-Type: text/plain; charset="iso-8859-1"

Actually,
the devices being spoken of cover a range from around 100 Khz
to approximately 900 Mhz, in various power levels, with some
really nice, and large power capabilities up to around 30 KW.

Here where I work, University Chemistry Dept. we have Mass Spec
units that go down to the low end, and wafer coating gear that goes
to the high end. One particularly fascinating unit is the 100 KW,
480Khz unit, followed byt the 15KW (tunable) 13.56 unit.

For regular folks unfortunately these require three phase power
and lots of it. However, in most units the driver sections are in the 1 
KW
range and make great amplifiers for the Amateur community, willing to
make the necessary modifications to them.

I have several pictures of the units here, if anyone is interested, or
one can do a search on E-bay for RF Plasma, or ENI, or RFS, and
see some other examples.

Jim
WB2FCN

----- Original Message -----
From: Revcom
To: Bob Hardie- W5UQ ; david freeman
Cc: boatanchors at mailman.qth.net
Sent: Wednesday, February 04, 2009 6:50 PM
Subject: Re: [Boatanchors] Interesting place to find HV and amp parts . 
. .


What do those things run on? 10 something MHz? Big MRI transmitter, er
scanner, at regional Hosp
runs at 25.407Mhz, lotsa watts.

Rod
K0EQH

----- Original Message -----
From: Bob Hardie- W5UQ
To: david freeman
Cc: boatanchors at mailman.qth.net
Sent: Wednesday, February 04, 2009 5:34 PM
Subject: Re: [Boatanchors] Interesting place to find HV and amp parts . 
. .


I used to work and maintain one of those transmitters... I mean seam
sealers.

A "Tent and Awning" company in Tulsa asked me to come out and look at 
their
splicer. I was saying, "what????" Well, I was a consulting engineer and
decided to go look. This was in the 80's. When I got there I found 
basically
an AM transmitter that caused enough RF in the BIG BAR that was several 
feet
long, that it melted the plastic, or whatever materials, together. I 
fixed the
transmitter and it worked.
I have to admit that this was, at first thought, strange. But it turned 
out
to be "simple"..... A transmitter to splice material together???? oh 
well.......

Live and learn...
Bob W5UQ

david freeman wrote:
My sister and her husband own and tent/awning shop. They use a number 
of RF
seemers to melt the vinyl canvas together. The two pieces of vinyl are 
smashed
between two aluminum bars about 18" long. The bars serve as part of the
capacitance in the tank circuit (I think). I look at their machinery 
and see
some pretty heavy duty parts that would easily make a multi-kW rig.

Dave, WW8S
----- Original Message -----
From: butwheat <butwheat73 at gmail.com>
To: boatanchors at mailman.qth.net
Subject: [Boatanchors] Interesting place to find HV and amp parts . . .
Date: Wed, 4 Feb 2009 10:16:50 -0500


Strange place to find these parts:

http://www.landlmachinery.com/Parts.html

HTH es 73 de Mark KX8XX
...-.-

.

.
______________________________________________________________
Boatanchors mailing list
Home: http://mailman.qth.net/mailman/listinfo/boatanchors
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Boatanchors at mailman.qth.net

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Please help support this email list: http://www.qsl.net/donate.html





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