On 1/24/2015 11:14 AM, amps-request@contesting.com wrote:
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Today's Topics:
1. Re: Vendor For Transformer Rewind (Joe Subich, W4TV)
2. Re: Vendor For Transformer Rewind (Vic Rosenthal 4X6GP/K2VCO)
3. Re: ceramic vs glass (Carl)
4. Re: ceramic vs glass (Carl)
5. Re: ceramic vs glass (Col. Paul E. Cater)
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Message: 1
Date: Sat, 24 Jan 2015 12:07:16 -0500
From: "Joe Subich, W4TV" <lists@subich.com>
To: amps@contesting.com
Subject: Re: [Amps] Vendor For Transformer Rewind
Message-ID: <54C3D144.7030509@subich.com>
Content-Type: text/plain; charset=utf-8; format=flowed
> Is there anywhere in the US that still has 120/240 volt power?
Most residential in the US is 120/240 - even 123/246 as utilities
push the limits to minimize transmission losses.
Just for fun, I just checked my line voltage. Here in a semi-rural
area on Saturday morning with no particularly heavy load conditions
(neither heat nor A/C), I'm seeing 122.5/245 V. If I were rewinding,
I would consider 208/220/230/245 and maybe 260 (or 208/220/235/250)
as I expect the overvoltage to continue to worsen.
The increasing number of devices with switching supplies will not
be impacted by 20% overvoltage, but tubes, etc. don't like even 10%
overvoltage if you're looking to get maximum filament life.
73,
... Joe, W4TV
On 2015-01-24 11:44 AM, Martin A Flynn wrote:
Vic
240 is the original operating voltage. Considering the cost of the
tube, I don't want to starve the filaments by operating at the lower
voltage.
Is there anywhere in the US that still has 120/240 volt power?
73, Martin
W2RWJ
On 1/24/2015 11:31 AM, Vic Rosenthal wrote:
But he should have them add a tap for 240, too.
Vic K2VCO /4X6GP
On Jan 24, 2015, at 5:56 PM, Jim W7RY <w7ry@centurytel.net> wrote:
Agreed!
73
Jim W7RY
-----Original Message----- From: Paul Kraemer Sent: Saturday, January
24, 2015 7:06 AM To: maflynn@theflynn.org ; amps@contesting.com
Subject: Re: [Amps] Vendor For Transformer Rewind
Martin
My vote goes hands down to the folks at Heyboer
Paul K0UYA
Electric motor rewind shops and do this. Also Hammond in Canada.
Gary...wa6fgi
-----Original Message----- From: Martin A Flynn Sent: Saturday,
January 24, 2015 8:51 AM To: amps@contesting.com Subject: [Amps]
Vendor For Transformer Rewind
A while back I had picked up a Henry 3002A amplifier with a shorted
transformer. I am interested in locating a vendor to re-wind the
original (or supply a replacement) that will not require butchering
the chassis, along with adding taps on the primary for 208 and 220
(club station is 208, house is 220)
73 W2RWJ
Martin
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------------------------------
Message: 2
Date: Sat, 24 Jan 2015 20:26:32 +0200
From: Vic Rosenthal 4X6GP/K2VCO <k2vco.vic@gmail.com>
To: maflynn@theflynn.org, Jim W7RY <w7ry@centurytel.net>
Cc: "<amps@contesting.com>" <amps@contesting.com>
Subject: Re: [Amps] Vendor For Transformer Rewind
Message-ID: <54C3E3D8.9090408@gmail.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
I see. I didn't understand. I thought you meant ONLY 208 and 220.
My old QTH in Fresno was usually quite close to 240.
On 24 Jan 2015 18:44, Martin A Flynn wrote:
Vic
240 is the original operating voltage. Considering the cost of the
tube, I don't want to starve the filaments by operating at the lower
voltage.
Is there anywhere in the US that still has 120/240 volt power?
73, Martin
W2RWJ
On 1/24/2015 11:31 AM, Vic Rosenthal wrote:
But he should have them add a tap for 240, too.
Vic K2VCO /4X6GP
On Jan 24, 2015, at 5:56 PM, Jim W7RY <w7ry@centurytel.net> wrote:
Agreed!
73
Jim W7RY
-----Original Message----- From: Paul Kraemer Sent: Saturday, January
24, 2015 7:06 AM To: maflynn@theflynn.org ; amps@contesting.com
Subject: Re: [Amps] Vendor For Transformer Rewind
Martin
My vote goes hands down to the folks at Heyboer
Paul K0UYA
-----Original Message----- From: Martin A Flynn Sent: Saturday,
January 24, 2015 8:51 AM To: amps@contesting.com Subject: [Amps]
Vendor For Transformer Rewind
A while back I had picked up a Henry 3002A amplifier with a shorted
transformer. I am interested in locating a vendor to re-wind the
original (or supply a replacement) that will not require butchering
the chassis, along with adding taps on the primary for 208 and 220
(club station is 208, house is 220)
73 W2RWJ
Martin
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