[Amps] 4cx800a/gu74b anode clips
Thomas Hix
w4th at hotmail.com
Mon Feb 2 18:18:13 EST 2004
Anyone know a good supplier of annode clips for the 4cx800a/gu74b
tubes?...Need a lot.
Thanks
Tom
>From: amps-request at contesting.com
>Reply-To: amps at contesting.com
>To: amps at contesting.com
>Subject: Amps Digest, Vol 14, Issue 2
>Date: Mon, 2 Feb 2004 09:22:59 -0500 (EST)
>
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>
>Today's Topics:
>
> 1. Re: Re: Amps Digest, Vol 13, Issue 52 (Ed Briggs)
> 2. Re: BTI (R.Measures)
> 3. Re: Re: Amps Digest, Vol 13, Issue 52 (R.Measures)
> 4. Re: Re: matching network (R.Measures)
> 5. Coleman lantern chimneys for 3CX1200A7/Z7 and 3-500Z
> (W0UN -- John Brosnahan)
> 6. Re: Re: Amps Digest, Vol 13, Issue 52 (Jan Erik Holm)
> 7. Re: Re: Amps Digest, Vol 13, Issue 52 (David A. Pruett)
> 8. RE: bird 43 slug (Skram, Helge (MED))
> 9. RF Deck Amplifier Component Package
>
>
>----------------------------------------------------------------------
>
>Date: Sun, 01 Feb 2004 09:43:04 -0500
>From: Ed Briggs <edbriggs at optonline.net>
>To: W0UN -- John Brosnahan <shr at swtexas.net>, K3vw at aol.com,
> amps at contesting.com
>Subject: Re: [Amps] Re: Amps Digest, Vol 13, Issue 52
>Message-ID: <002401c3e8d1$b37da270$6701a8c0 at sonybox>
>References: <5.2.1.1.2.20040131213134.00b90478 at pop3.swtexas.net>
>Content-Type: text/plain; charset=iso-8859-1
>MIME-Version: 1.0
>Content-Transfer-Encoding: 7BIT
>Precedence: list
>Message: 1
>
>RF Parts sells 3 different chimneys for the 3-500; the are 4, 4.25, and
>4.75 inches tall respectively to accomodate (among other things) recessed
>sockets.
>
>Ameritron sells the 3-500 chimney for $22, which is substantially less than
>the above. This model is also used with a 1200a7 and a recessed socket.
>
>Ed
>----- Original Message -----
>From: "W0UN -- John Brosnahan" <shr at swtexas.net>
>To: <K3vw at aol.com>; <amps at contesting.com>
>Sent: Saturday, January 31, 2004 10:36 PM
>Subject: Re: [Amps] Re: Amps Digest, Vol 13, Issue 52
>
>
> > At 04:56 PM 1/31/2004, K3vw at aol.com wrote:
> >
> > >You can use a 3-500Z chimney with the 3CX1200A7, Ameritron does ! Willy
>K3VW
> >
> > So, if the Coleman lantern double mantle chimney works with a 4-400A
> > and that is the same size as a 3-500Z and if the 3-500Z chimney
> > works on the 3CX1200A7 then it sounds like the Coleman
> > lantern double mantle chimney should work with a 3CX1200A7.
> >
> > Can anyone confirm that this is the case? Don't know the price of
> > the Coleman lantern chimney these days but it used to be a
> > relatively inexpensive way to get Pyrex glass for your 4-400As.
> >
> > Since I have a couple of 3CX1200xx tubes (A7 and Z7) but no
> > chimneys this would be a good thing to know. Except for the
> > fact that a clear chimney is a real waste with an external anode
> > tube.
> >
> > --John W0UN
> >
> >
>
>
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>
> > _______________________________________________
> > Amps mailing list
> > Amps at contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
>
>------------------------------
>
>Date: Sun, 1 Feb 2004 07:11:05 -0800
>From: R.Measures <r at somis.org>
>To: "Roger Cranford K5ALU" <k5alu at yahoo.com>,
> " AMPS" <amps at contesting.com>
>Subject: [Amps] Re: BTI
>Message-ID: <20040201151120.564263197BD at dayton.akorn.net>
>Content-Type: text/plain; charset="US-ASCII"
>MIME-Version: 1.0
>Precedence: list
>Message: 2
>
>** The principles for adding 160m to an 80m - 10m amplifier are outlined
>in:
>http://www.somis.org/add.160m.html
>- Unless the bandswitch is toasted from parasitic-arcing, there is no
>reason to make a BTI into a monobander.
>
> >Hi !!
> >
> >Do you know of anyone who have modified the old BTI
> >for 160 meters ?? We have a couple here we want to
> >single band one for 160.
> >
> >Many thanks and 73
> >de
> >RED K5ALU
> >Springfield,MO
> >
> >=====
> >Roger Cranford
> >K5ALU "RED"
> >
> >__________________________________
> >Do you Yahoo!?
> >Yahoo! SiteBuilder - Free web site building tool. Try it!
> >http://webhosting.yahoo.com/ps/sb/
> >
>------------------------------
>
>Date: Sun, 1 Feb 2004 07:23:35 -0800
>From: R.Measures <r at somis.org>
>To: "W0UN -- John Brosnahan" <shr at swtexas.net>, <K3vw at aol.com>,
> " AMPS" <amps at contesting.com>
>Subject: Re: [Amps] Re: Amps Digest, Vol 13, Issue 52
>Message-ID: <20040201152349.35BCB31982F at dayton.akorn.net>
>Content-Type: text/plain; charset="US-ASCII"
>MIME-Version: 1.0
>Precedence: list
>Message: 3
>
>
>
> >At 04:56 PM 1/31/2004, K3vw at aol.com wrote:
> >
> >>You can use a 3-500Z chimney with the 3CX1200A7, Ameritron does ! Willy
>K3VW
> >
> >So, if the Coleman lantern double mantle chimney works with a 4-400A
> >and that is the same size as a 3-500Z and if the 3-500Z chimney
> >works on the 3CX1200A7 then it sounds like the Coleman
> >lantern double mantle chimney should work with a 3CX1200A7.
> >
> >Can anyone confirm that this is the case? Don't know the price of
> >the Coleman lantern chimney these days but it used to be a
> >relatively inexpensive way to get Pyrex glass for your 4-400As.
> >
> >Since I have a couple of 3CX1200xx tubes (A7 and Z7) but no
> >chimneys this would be a good thing to know. Except for the
> >fact that a clear chimney is a real waste with an external anode
> >tube.
> >
>** John -- A friend who worked in the broadcast industry told me that
>tetrodes with handles (such as the 8281) emit blue-light from their
>ceramic anode insulator. This phenomenon is apparently due to electrons
>missing the anode, and impacting the ceramic -- which causes
>flourescence.
>
>------------------------------
>
>Date: Sun, 1 Feb 2004 07:25:50 -0800
>From: R.Measures <r at somis.org>
>To: "Ian White, G3SEK" <g3sek at ifwtech.co.uk>,
> " AMPS" <amps at contesting.com>
>Subject: Re: [Amps] Re: matching network
>Message-ID: <20040201152604.20940319808 at dayton.akorn.net>
>Content-Type: text/plain; charset="US-ASCII"
>MIME-Version: 1.0
>Precedence: list
>Message: 4
>
>
>
> >R. Measures wrote:
> >>>>** Ian -- How does one convert this figure into a determination of
> >>>>how grid current divides between the grid and the screen during g-g
> >>>>operation?
> >>>
> >>>
> >>>Sorry, maybe what I said was misleading - I'm not sure if it's possible
> >>>to calculate Ig1/Ig2 in cathode-driven operation directly from mu-g1g2.
> >>>
> >>>They both result from the tube's internal tube construction, however,
> >>>which is why I believe that if one is high, the other will be too.
> >>>
> >>** So if a tetrode with a g-/g2 amplification of 4 to 5 has c. 25% of
> >>total grid current flowing in the screen, a tube with a g/g2
> >>amplification of 13 might have c. 8% of the total grid-current flowing
>in
> >>the screen?
> >
> >Couldn't say... you'd have to do a point-by-point analysis using the
> >characteristic curves.
> >
>** Ian -- The sticky wicket is that there are no characteristic curves
>for 0V on the screen.
>------------------------------
>
>Date: Sun, 01 Feb 2004 09:42:10 -0600
>From: W0UN -- John Brosnahan <shr at swtexas.net>
>To: amps at contesting.com
>Subject: [Amps] Coleman lantern chimneys for 3CX1200A7/Z7 and 3-500Z
>Message-ID: <5.2.1.1.2.20040201093613.0292c390 at pop3.swtexas.net>
>In-Reply-To: <002401c3e8d1$b37da270$6701a8c0 at sonybox>
>References: <5.2.1.1.2.20040131213134.00b90478 at pop3.swtexas.net>
>Content-Type: multipart/mixed; x-avg-checked=avg-ok-6B365C25;
> boundary="=======F1767DF======="
>MIME-Version: 1.0
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>
>--=======F1767DF=======
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> format=flowed
>Content-Transfer-Encoding: 8bit
>
>While at Alpha/Power I learned how easy it is to make the
>silicon rubber chimneys used in Alpha amps--the only real
>problem is finding a decent source for the material in
>small quantities.
>
>Just checked out some Coleman replacement chimneys
>for their double mantle lanterns and the going price is about
>$8.50. Pretty decent price for a Pyrex chimney for the
>3-500 and 3XC1200 tubes--assuming it fits OK.
>
>Think I will measure my 1200s and see what diameter and
>height of chimney they require and the next time I go to town
>I will purchase one to play with.
>
>--John W0UN
>
>At 08:43 AM 2/1/2004, Ed Briggs wrote:
>
> >RF Parts sells 3 different chimneys for the 3-500; the are 4, 4.25, and
> >4.75 inches tall respectively to accomodate (among other things) recessed
> >sockets.
> >
> >Ameritron sells the 3-500 chimney for $22, which is substantially less
>than
> >the above. This model is also used with a 1200a7 and a recessed socket.
> >
> >Ed
>
>
>--=======F1767DF=======
>Content-Type: text/plain; charset=us-ascii; x-avg=cert;
> x-avg-checked=avg-ok-6B365C25
>Content-Disposition: inline
>
>
>---
>Outgoing mail is certified Virus Free.
>Checked by AVG anti-virus system (http://www.grisoft.com).
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>
>------------------------------
>
>Date: Sun, 01 Feb 2004 18:49:56 +0100
>From: Jan Erik Holm <sm2ekm at telia.com>
>To: amps at contesting.com
>Subject: Re: [Amps] Re: Amps Digest, Vol 13, Issue 52
>Message-ID: <401D3C44.2050800 at telia.com>
>In-Reply-To: <5.2.1.1.2.20040131213134.00b90478 at pop3.swtexas.net>
>References: <5.2.1.1.2.20040131213134.00b90478 at pop3.swtexas.net>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>MIME-Version: 1.0
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>Message: 6
>
>I checked the Coleman web page but couldn´t find any
>chimneys, any clue where to find them? Maybe they are
>there someplace but I didn´t spot them.
>
>73 Jim SM2EKM
>------------------------------------------------------
>
>W0UN -- John Brosnahan wrote:
>
> > At 04:56 PM 1/31/2004, K3vw at aol.com wrote:
> >
> >> You can use a 3-500Z chimney with the 3CX1200A7, Ameritron does !
> >> Willy K3VW
> >
> >
> > So, if the Coleman lantern double mantle chimney works with a 4-400A
> > and that is the same size as a 3-500Z and if the 3-500Z chimney
> > works on the 3CX1200A7 then it sounds like the Coleman
> > lantern double mantle chimney should work with a 3CX1200A7.
> >
> > Can anyone confirm that this is the case? Don't know the price of
> > the Coleman lantern chimney these days but it used to be a
> > relatively inexpensive way to get Pyrex glass for your 4-400As.
> >
> > Since I have a couple of 3CX1200xx tubes (A7 and Z7) but no
> > chimneys this would be a good thing to know. Except for the
> > fact that a clear chimney is a real waste with an external anode
> > tube.
> >
> > --John W0UN
> >
> >
> > ------------------------------------------------------------------------
> >
> >
> > ---
> > Outgoing mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.564 / Virus Database: 356 - Release Date: 1/19/2004
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Amps mailing list
> > Amps at contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
>
>
>------------------------------
>
>Date: Sun, 01 Feb 2004 14:29:45 -0500
>From: "David A. Pruett" <k8cc at comcast.net>
>To: K3vw at aol.com, amps at contesting.com
>Subject: Re: [Amps] Re: Amps Digest, Vol 13, Issue 52
>Message-ID: <5.2.1.1.0.20040201142406.00aad3c0 at mail.comcast.net>
>In-Reply-To: <5.2.1.1.2.20040131213134.00b90478 at pop3.swtexas.net>
>References: <c.212ebc8d.2d4d8c9f at aol.com>
>Content-Type: text/plain; charset="us-ascii"; format=flowed
>MIME-Version: 1.0
>Precedence: list
>Message: 7
>
>I don't think a 3-500Z chimney will work with the 3CX1200A7. The *sockets*
>are the same, but the chimneys aren't. Even Eimac recomments a different
>chimney part number use with the 3CX1200.
>
>I would be very leery of using Coleman lantern chimneys with the
>3CX1200. The Coleman chimneys I have (acquired along with a pair of
>4-400As) are essentially just glass cylinders, with no reduction in
>diameter at the top to direct air at the plate seal. I suspect these work
>OK with glass tubes by directing the air past the major diameter of the
>envelope, although the plate seals will be left without direct cooling. In
>the case of the 3CX1200, the chimney is there to force air through the
>cooling fins. The Coleman chimneys won't do that very well at all.
>
>There may be different Coleman chimneys - I'm just relating what I've seen.
>
>Scrimping on chimneys seems to be poor economy to me when you consider the
>price of tubes.
>
>Dave/K8CC
>
>
>At 09:36 PM 1/31/04 -0600, W0UN -- John Brosnahan wrote:
> >At 04:56 PM 1/31/2004, K3vw at aol.com wrote:
> >
> >>You can use a 3-500Z chimney with the 3CX1200A7, Ameritron does ! Willy
>K3VW
> >
> >So, if the Coleman lantern double mantle chimney works with a 4-400A
> >and that is the same size as a 3-500Z and if the 3-500Z chimney
> >works on the 3CX1200A7 then it sounds like the Coleman
> >lantern double mantle chimney should work with a 3CX1200A7.
> >
> >Can anyone confirm that this is the case? Don't know the price of
> >the Coleman lantern chimney these days but it used to be a
> >relatively inexpensive way to get Pyrex glass for your 4-400As.
> >
> >Since I have a couple of 3CX1200xx tubes (A7 and Z7) but no
> >chimneys this would be a good thing to know. Except for the
> >fact that a clear chimney is a real waste with an external anode
> >tube.
> >
> >--John W0UN
> >
> >
> >
> >
> >---
> >Outgoing mail is certified Virus Free.
> >Checked by AVG anti-virus system (http://www.grisoft.com).
> >Version: 6.0.564 / Virus Database: 356 - Release Date: 1/19/2004
> >_______________________________________________
> >Amps mailing list
> >Amps at contesting.com
> >http://lists.contesting.com/mailman/listinfo/amps
>
>
>------------------------------
>
>Date: Mon, 2 Feb 2004 13:41:56 +0100
>From: "Skram, Helge (MED)" <helge.skram at med.ge.com>
>To: RICHARD GEORGE <k6kwq at msn.com>, amps <amps at contesting.com>
>Subject: RE: [Amps] bird 43 slug
>Message-ID: <82DBBA91AF7DA44286B33CE67B8C937602CB3D4A at frbucmsx01medge>
>Content-Type: text/plain;
> charset="iso-8859-1"
>MIME-Version: 1.0
>Precedence: list
>Message: 8
>
>Hello
>
>I purchased new from RF Parts one of the Bird 500w 400-1000MHz, that I
>intended to use on 1296MHz measuring power from a 2x7289 cavity amp.
>I have 3 Bird 43 meters in use.
>I stopped using the Bird 500w probe after it was verified to measure low by
>about 25%. There was also some erratic behaviour at high power levels.
>Purchased a EME directional coupler from SSB Electronis and this perfomed
>wery well and according to expectations. However maximum power is limited
>to
>200w at 1296MHz. Therefore I now have a 1-4GHz directional coupler from
>Narda, capable of 500w. This didn't cost me much more than a Bird slug and
>is highly recomended. Will need diode heads and meter. Was purchased second
>hand from Stewart of Reading in England.
>It is correct that the Bird slugs are more broadband at higher power
>levels.
>
>A 1000w 400-1000MHz probe should be reasonable accurate at 1296MHz.
>A 500w (at least mine) is so so.
>
>You can recalibrate the Bird slugs if you dare. There is a small trimpot in
>the probe that can be adsjusted.
>Have to remove the cover by heating it with a heatgun.
>To recalibrate Bird slugs you must have a primary reference with good
>accuracy.
>
>73 de LA6MV
>Helge
>
>
>-----Original Message-----
>From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]On
>Behalf Of RICHARD GEORGE
>Sent: 31. januar 2004 03:28
>To: amps
>Subject: [Amps] bird 43 slug
>
>
>Has any one ever had Bird make a custom slug for a Bird 43 wattmeter? I
>need
>a 500 watt slug for 1296mhz.
>Thanks
>
>
>
>
>K6KWQ Dick "12 Volt radios are for wimps, real radios can kill you" Still
>can't make it go QRO with "More Power"
>_______________________________________________
>Amps mailing list
>Amps at contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
>------------------------------
>
>Date: Mon, 2 Feb 2004 08:03:46 -0500
>From: w2cqm at juno.com
>To: Amps at contesting.com
>Subject: [Amps] RF Deck Amplifier Component Package
>Message-ID: <20040202.080730.2456.0.W2CQM at juno.com>
>Content-Type: text/plain
>MIME-Version: 1.0
>Content-Transfer-Encoding: 7bit
>Precedence: list
>Message: 9
>
>Offering essential and difficult to locate components for a homebrew
>10-80m 1500W amplfier project. Package includes a complete, intact,
>fully wired silver plated tank/bandswitch assembly. Bandswitch is a high
>quality porcelain Radio Switch(w/detents) easily reconfigured for up to
>a 1P8T circuit for switching in additional inductance for WARC bands or
>160m. Includes a 1" custom HD porcelain high voltage plate choke, wide
>spaced antenna tune capacitor w/padder, a dual section antenna tune
>cap, (2) 12V/10w zeners, and a parasitic choke/blocking capacitor. $140+
>shipping. Ron W2CQM/3
>------------------------------
>
>_______________________________________________
>Amps mailing list
>Amps at contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
>
>
>End of Amps Digest, Vol 14, Issue 2
>***********************************
Tom's Tubes: Specializing in Amateur Radio Amplifier Tubes, Sockets, & G3SEK
Triode/Tetrode Boards and Kits. http://www.tomstubes.com
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