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Today's Topics:
1. Umac 606 (Colin Lamb)
2. Re: Umac 606 (donroden@hiwaay.net)
3. Re: Umac 606 (Barrie - Yellowstone Photo)
4. Re: Umac 606 (Bill Turner)
5. Re: Solid state relays..again (Brian Carling)
6. Re: Solid state relays..again (TexasRF@aol.com)
7. Re: Solid state relays..again (Jeff Blaine)
8. Re: Umac 606 (Alek Petkovic)
----------------------------------------------------------------------
Message: 1
Date: Thu, 13 Feb 2014 09:10:12 -0800 (GMT-08:00)
From: Colin Lamb <k7fm@teleport.com>
To: amps@contesting.com
Subject: [Amps] Umac 606
Message-ID:
<3880453.1392311413670.JavaMail.root@wamui-junio.atl.sa.earthlink.net>
Content-Type: text/plain; charset=UTF-8
Has anyone made an amplifier using the Umac 606?
Looks like an interesting and practical tube. Data at:
http://www.tubecollectors.org/archives/606.pdf
73, Colin K7FM
------------------------------
Message: 2
Date: Thu, 13 Feb 2014 11:17:47 -0600
From: donroden@hiwaay.net
To: amps@contesting.com
Subject: Re: [Amps] Umac 606
Message-ID: <20140213111747.12803fljeppxsxmj@webmail.hiwaay.net>
Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes";
format="flowed"
Quoting Colin Lamb <k7fm@teleport.com>:
Has anyone made an amplifier using the Umac 606?
That grid will leak all over your ham shack floor.
Don W4DNR
------------------------------
Message: 3
Date: Thu, 13 Feb 2014 12:23:54 -0500 (EST)
From: Barrie - Yellowstone Photo <barrie@yellowstonephoto.com>
To: Colin Lamb <k7fm@teleport.com>, amps@contesting.com
Subject: Re: [Amps] Umac 606
Message-ID:
<1075478624.383486.1392312234961.open-xchange@email.1and1.com>
Content-Type: text/plain; charset=UTF-8
I'm using the Russian version, the "Don't Svetit Lana 69".
Barrie W7ALW
On February 13, 2014 at 12:10 PM Colin Lamb <k7fm@teleport.com> wrote:
Has anyone made an amplifier using the Umac 606?
Looks like an interesting and practical tube. Data at:
http://www.tubecollectors.org/archives/606.pdf
73, Colin K7FM
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Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
------------------------------
Message: 4
Date: Thu, 13 Feb 2014 09:27:47 -0800
From: Bill Turner <dezrat1242@wildblue.net>
To: amps@contesting.com
Subject: Re: [Amps] Umac 606
Message-ID: <52FD0093.6060007@wildblue.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
ORIGINAL MESSAGE: (may be snipped)
On 2/13/2014 9:10 AM, Colin Lamb wrote:
Has anyone made an amplifier using the Umac 606?
Looks like an interesting and practical tube. Data at:
http://www.tubecollectors.org/archives/606.pdf
73, Colin K7FM
REPLY:
Yes, actually that was my first amplifier before I knew better. I used
the later version, known as the 666 for obvious reasons.
Unfortunately it absorbed RF instead of generating it, but I am still
using it as a dummy load today. Because of the absorption issue, it
requires heating instead of cooling, and the grid, instead of leaking,
actually sucks.
Ah, the good 'ol days, especially April 1st.
73, Bill W6WRT
------------------------------
Message: 5
Date: Thu, 13 Feb 2014 10:16:48 -0500
From: Brian Carling <bcarling@cfl.rr.com>
To: Jim W7RY <w7ry@centurytel.net>
Cc: "amps@contesting.com" <amps@contesting.com>
Subject: Re: [Amps] Solid state relays..again
Message-ID: <0EA738E1-F0BE-4FE2-83E3-C57C62499D80@cfl.rr.com>
Content-Type: text/plain; charset=us-ascii
The little black varistor thingies work quite nicely for eliminating that
"THUMMMPP!" in small to medium-size equipment.
I don't really know what they are but somebody gave me a whole bunch of them a
while back. I have two or three different sizes.
Best regards - Bry Carling
On Feb 13, 2014, at 10:08 AM, Jim W7RY <w7ry@centurytel.net> wrote:
That's why I put step start in my large Astron power supplies. No more thump.
No more blown up power switches.
73
Jim W7RY
On 2/13/2014 4:01 AM, Ken Durand wrote:
" And this, my dear friends, is why equipment with steel boxes and big
transformers inside can make that "WHummpppp" at the moment it's switched
on.
Of course, in equipment controlled by a simple mechanical power switch, it's
impossible to decide when exactly in the cycle the switch will close. It's
this a lottery how close we will get to the peak voltage point, or the zero
crossing. That's why sometimes the "WHummpppp" is strong, sometimes weaker,
and sometimes even non-existent."
Thanks for that bit of wisdom Manfred. I never could figure out why
sometimes I get the "WHummpppp" and other times the sound would be quite
different or non-existent like you described.
Ken
N4zed
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Manfred
Mornhinweg
Sent: Wednesday, February 12, 2014 12:56 PM
To: amps@contesting.com
Subject: Re: [Amps] Solid state relays..again
Hello,
Once in a while that thing turns on with a WHummpppp and a low
frequency ringing that just trails off.
Let's see if I can explain this in a way everyone can understand.
------------------------------
Message: 6
Date: Thu, 13 Feb 2014 13:22:37 -0500 (EST)
From: TexasRF@aol.com
To: bcarling@cfl.rr.com, w7ry@centurytel.net
Cc: amps@contesting.com
Subject: Re: [Amps] Solid state relays..again
Message-ID: <8f4b.6d151b83.402e676d@aol.com>
Content-Type: text/plain; charset="US-ASCII"
Surge limiter. usually installed in one leg of the AC line connection.
When cold, have high resistance. When hot, low resistance. So, they run warm
to hot when in use. You would not want them to be located in a stream of
cooling air as that could spoil the low R characteristic.
Very interesting and useful device. I use them to limit turn on filament
current in large transmitting tubes.
Available through Mouser and other distributors.
73,
Gerald K5GW
In a message dated 2/13/2014 10:15:13 A.M. Pacific Standard Time,
bcarling@cfl.rr.com writes:
The little black varistor thingies work quite nicely for eliminating that
"THUMMMPP!" in small to medium-size equipment.
I don't really know what they are but somebody gave me a whole bunch of
them a while back. I have two or three different sizes.
Best regards - Bry Carling
On Feb 13, 2014, at 10:08 AM, Jim W7RY <w7ry@centurytel.net> wrote:
That's why I put step start in my large Astron power supplies. No more
thump. No more blown up power switches.
73
Jim W7RY
On 2/13/2014 4:01 AM, Ken Durand wrote:
" And this, my dear friends, is why equipment with steel boxes and big
transformers inside can make that "WHummpppp" at the moment it's
switched
on.
Of course, in equipment controlled by a simple mechanical power switch,
it's
impossible to decide when exactly in the cycle the switch will close.
It's
this a lottery how close we will get to the peak voltage point, or the
zero
crossing. That's why sometimes the "WHummpppp" is strong, sometimes
weaker,
and sometimes even non-existent."
Thanks for that bit of wisdom Manfred. I never could figure out why
sometimes I get the "WHummpppp" and other times the sound would be quite
different or non-existent like you described.
Ken
N4zed
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Manfred
Mornhinweg
Sent: Wednesday, February 12, 2014 12:56 PM
To: amps@contesting.com
Subject: Re: [Amps] Solid state relays..again
Hello,
Once in a while that thing turns on with a WHummpppp and a low
frequency ringing that just trails off.
Let's see if I can explain this in a way everyone can understand.
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
------------------------------
Message: 7
Date: Thu, 13 Feb 2014 14:14:13 -0600
From: "Jeff Blaine" <keepwalking188@yahoo.com>
To: <TexasRF@aol.com>, <bcarling@cfl.rr.com>, <w7ry@centurytel.net>
Cc: amps@contesting.com
Subject: Re: [Amps] Solid state relays..again
Message-ID: <6E727EB555BE4111A627009724E4B8B9@w520>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
As an alternative to a resistor based SSR, what about something like the
Cyrdom SST240 soft-start module?
This gadget sits next to the SSR and ramps up the duty cycle of the SSR over
a 3-second period. There is (was) another variant that had a variable ramp
up time. Crydom has replaced these with more complicated modules but the
old ones are still around.
http://www.crydom.com/en/products/catalog/AdvancedWebPage.aspx?CategoryText1=Obsolete%20Products&CategoryText2=SST%20Series%20Soft-start%20modules&SBCatPage=
73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie
-----Original Message-----
From: TexasRF@aol.com
Sent: Thursday, February 13, 2014 12:22 PM
To: bcarling@cfl.rr.com ; w7ry@centurytel.net
Cc: amps@contesting.com
Subject: Re: [Amps] Solid state relays..again
Surge limiter. usually installed in one leg of the AC line connection.
When cold, have high resistance. When hot, low resistance. So, they run
warm
to hot when in use. You would not want them to be located in a stream of
cooling air as that could spoil the low R characteristic.
Very interesting and useful device. I use them to limit turn on filament
current in large transmitting tubes.
Available through Mouser and other distributors.
73,
Gerald K5GW
In a message dated 2/13/2014 10:15:13 A.M. Pacific Standard Time,
bcarling@cfl.rr.com writes:
The little black varistor thingies work quite nicely for eliminating that
"THUMMMPP!" in small to medium-size equipment.
I don't really know what they are but somebody gave me a whole bunch of
them a while back. I have two or three different sizes.
Best regards - Bry Carling
On Feb 13, 2014, at 10:08 AM, Jim W7RY <w7ry@centurytel.net> wrote:
That's why I put step start in my large Astron power supplies. No more
thump. No more blown up power switches.
73
Jim W7RY
On 2/13/2014 4:01 AM, Ken Durand wrote:
" And this, my dear friends, is why equipment with steel boxes and big
transformers inside can make that "WHummpppp" at the moment it's
switched
on.
Of course, in equipment controlled by a simple mechanical power switch,
it's
impossible to decide when exactly in the cycle the switch will close.
It's
this a lottery how close we will get to the peak voltage point, or the
zero
crossing. That's why sometimes the "WHummpppp" is strong, sometimes
weaker,
and sometimes even non-existent."
Thanks for that bit of wisdom Manfred. I never could figure out why
sometimes I get the "WHummpppp" and other times the sound would be quite
different or non-existent like you described.
Ken
N4zed
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Manfred
Mornhinweg
Sent: Wednesday, February 12, 2014 12:56 PM
To: amps@contesting.com
Subject: Re: [Amps] Solid state relays..again
Hello,
Once in a while that thing turns on with a WHummpppp and a low
frequency ringing that just trails off.
Let's see if I can explain this in a way everyone can understand.
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
------------------------------
Message: 8
Date: Fri, 14 Feb 2014 06:01:16 +0800
From: Alek Petkovic <vk6apk@bigpond.com>
To: donroden@hiwaay.net
Cc: amps@contesting.com
Subject: Re: [Amps] Umac 606
Message-ID: <52FD40AC.8040500@bigpond.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I run zero bias with my 606 amp.
I mix the leak with Coke Zero and some ice.
Volatility is reduced. Cooling is taken care of and my glass is
continually full.
Alek. VK6APK
On 14/02/2014 1:17 AM, donroden@hiwaay.net wrote:
Quoting Colin Lamb <k7fm@teleport.com>:
Has anyone made an amplifier using the Umac 606?
That grid will leak all over your ham shack floor.
Don W4DNR
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http://lists.contesting.com/mailman/listinfo/amps