Carlos my late father, ZL1ACP re-tubed his 30L1 with 572B's without
modification and the amp ran fine. He late sold it as re-tubed with no
adverse comment from the purchaser.
73
John Powell. ZL1BHQ
----- Original Message -----
From: <amps-request@contesting.com>
To: <amps@contesting.com>
Sent: Monday, January 24, 2005 4:27 PM
Subject: Amps Digest, Vol 25, Issue 60
> Send Amps mailing list submissions to
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> Today's Topics:
>
> 1. Re: GS35b.TUB file? (Tony King - W4ZT)
> 2. Re: GS35b.TUB file? (Tomm Aldridge)
> 3. Dahl transformer in Alpha (Robert Wood)
> 4. 30L-1 and 572B (Carlos Avellanet [KF4RRN])
> 5. Re: 30L-1 and 572B (carl seyersdahl)
> 6. Re: 30L-1 and 572B (Carlos Avellanet [KF4RRN])
> 7. OT help (Roger D Johnson)
> 8. Re: Denton Clipperton L (Mark - AA6DX)
> 9. AMPLIFIER REPAIRS (Robert W Epling)
> 10. Re: AMPLIFIER REPAIRS (Tony King - W4ZT)
> 11. what is the mu or "amplification factor" of a gs35b???
> (Tomm Aldridge)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 23 Jan 2005 16:58:39 -0500
> From: Tony King - W4ZT <amps@w4zt.com>
> Subject: Re: [Amps] GS35b.TUB file?
> To: amps@contesting.com
> Message-ID: <41F41E0F.40102@w4zt.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> I'd be interested in your data file if you build one. I don't have one.
>
> 73, Tony W4ZT
>
> Tomm Aldridge wrote:
> > Before I go and make one, does anyone have a GS35b.TUB data file for teh
> > TAP2 program?
> >
> > Tomm, KD7QAE
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sun, 23 Jan 2005 22:07:47 +0000
> From: Tomm Aldridge <KD7QAE@ARRL.NET>
> Subject: Re: [Amps] GS35b.TUB file?
> To: Tony King - W4ZT <amps@w4zt.com>
> Cc: amps@contesting.com
> Message-ID: <41F42033.9070706@ARRL.NET>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> So far have not found one. Am somewhat confused by Gain parameter.
> Have no idea what that I but if it is power gain, then I suppose 100W in
> giving 1500W out yields a power gain of 15.
>
> Next to do the VgIg interpolation for 8 Ia values and 2 Va values.
>
> Name = GS35B (Name of File, use DOS conventions
> .TUB extension automatically added)
>
> VB Max = 4500 (Maximum Plate Voltage Rating)
>
> VB Low = 400 (From Grounded Grid Constant Current
> Characteristics curves.
>
> VB High = 1200 (From Grounded Grid Constant Current
> Characteristics curves. ~ 2 to 3 * VB Low)
>
> Gain = 15 (Tube Amplification Factor)
>
> Cin = 21.5 (Grid-Cath Capacitance in pF)
> Cout = 4.5 (Grid-Plate Capacitance in pF)
>
> PDiss = 1500 (Max Plate Dissipation of Device)
> GDiss = 26 (Max Grid Dissipation of Device)
>
> Tony King - W4ZT wrote:
> > I'd be interested in your data file if you build one. I don't have one.
> >
> > 73, Tony W4ZT
> >
> > Tomm Aldridge wrote:
> >
> >> Before I go and make one, does anyone have a GS35b.TUB data file for
> >> teh TAP2 program?
> >>
> >> Tomm, KD7QAE
> >> _______________________________________________
> >> 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: 3
> Date: Sun, 23 Jan 2005 16:45:40 -0600
> From: Robert Wood <rwood90@direcway.com>
> Subject: [Amps] Dahl transformer in Alpha
> To: amps@contesting.com
> Message-ID: <009e01c5019d$4a15e7d0$0100a8c0@SARAH>
> Content-Type: text/plain; charset=Windows-1252
>
>
> Would like to discuss 3cx800 Tube install in Alpha
> WITH
>
> Dahl transformer that runs higher Plate Voltage
> with anyone using this model transformer:
> >From the catalog:
>
> ALPHA 76A POWER TRANSFORMER
> FOR ALPHA MODELS 76A, 76PA, 76CA & 78
> CORE) B-0393/ C-CORE STYLE #) 10 HIPERSIL C-CORE
> PR) 120/240 VAC 60 HZ 1 PH
>
> S1) 0-1200-1950 VAC @ 0.5A CCS
>
> S2) 40 VCT @ 0.5A CCS
>
> S3) 25 VAC @ 1A CCS
>
> S4) 6.3 VAC @ 9.6A CCS
>
> DM) HT = 6.000 WT = 6.325 DT = 6.281 MD = 3.625 MW = 4.000
> PRICE) $310.00 Plus S&H FOB El Paso, TX WEIGHT) 23 LBS
>
> Tnx,
>
> Robert W5AJ
>
>
> ------------------------------
>
> Message: 4
> Date: Sun, 23 Jan 2005 17:29:37 -0600
> From: "Carlos Avellanet [KF4RRN]" <kf4rrn@cox.net>
> Subject: [Amps] 30L-1 and 572B
> To: <amps@contesting.com>
> Message-ID: <008a01c501a3$6736aa60$6600a8c0@ATHLON>
> Content-Type: text/plain; charset=Windows-1252
>
> I just purchased a fixer upper Collins 30L-1 amp. It has a bad power
switch
> and it may need tubes. I have a brand new set of 572B here. Is it OK to
> just drop the 572B's in place of the 811's or do I have to mod the amp in
> any way? I am still looking for a power switch. If you have one contact
me
> direct.
>
> Thanks,
> Carlos. KF4RRN
>
>
>
> --
> No virus found in this outgoing message.
> Checked by AVG Anti-Virus.
> Version: 7.0.300 / Virus Database: 265.7.1 - Release Date: 1/19/2005
>
>
>
> ------------------------------
>
> Message: 5
> Date: Sun, 23 Jan 2005 18:54:56 -0500
> From: "carl seyersdahl" <carlseye@tampabay.rr.com>
> Subject: Re: [Amps] 30L-1 and 572B
> To: "Carlos Avellanet [KF4RRN]" <kf4rrn@cox.net>,
> <amps@contesting.com>
> Message-ID: <028001c501a6$f12bb6e0$f13bca44@tampabay.rr.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Carlos: I can't help you with the switch , but yes, you can run the 572B's
> without any mods, it's just that it's kind of a waste of good tubes.I
> wouldn't buy new 572B's , but as long as you've got them you can use them.
> If it were mine I'd use the tubes only until I could get a new set of
> 811A's.
> There is one item that could be fatal to your exciter if you have a
modern
> solid state rig. the 30-L1 keying ckt uses 120 volts for the ant. relay.
> I'd strongly suggest you look into the use of "soft keying" setup to
reduce
> the keying voltage requirements. you need to look closely at things like
the
> filter caps, and any sign of overheating or other damage also.!!!
> good luck with your project.!!!
> carl / kz5ca
> ----- Original Message -----
> From: "Carlos Avellanet [KF4RRN]" <kf4rrn@cox.net>
> To: <amps@contesting.com>
> Sent: Sunday, January 23, 2005 6:29 PM
> Subject: [Amps] 30L-1 and 572B
>
>
> > I just purchased a fixer upper Collins 30L-1 amp. It has a bad power
> switch
> > and it may need tubes. I have a brand new set of 572B here. Is it OK
to
> > just drop the 572B's in place of the 811's or do I have to mod the amp
in
> > any way? I am still looking for a power switch. If you have one
contact
> me
> > direct.
> >
> > Thanks,
> > Carlos. KF4RRN
> >
> >
> >
> > --
> > No virus found in this outgoing message.
> > Checked by AVG Anti-Virus.
> > Version: 7.0.300 / Virus Database: 265.7.1 - Release Date: 1/19/2005
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
>
>
>
>
> ------------------------------
>
> Message: 6
> Date: Sun, 23 Jan 2005 18:05:01 -0600
> From: "Carlos Avellanet [KF4RRN]" <kf4rrn@cox.net>
> Subject: Re: [Amps] 30L-1 and 572B
> To: <amps@contesting.com>
> Message-ID: <00af01c501a8$59f6fee0$6600a8c0@ATHLON>
> Content-Type: text/plain; charset=iso-8859-1
>
> Thanks for the quick reply and info on the tubes Carl. As for the relay,
> yes, I never connect an older amp to a newer radio direct, even when some
of
> them do work. I have the little Ameritron amp interface that works with
my
> SB-220 and L-4B. I am sure it would works just fine with the Collins.
> Hopefully I'll get to buy me a Collins radio to go with the amp--wishful
> thinking-- and then I won't have to worry about it. ;>
>
> 73,
> Carlos. KF4RRN
>
>
>
> > There is one item that could be fatal to your exciter if you have a
> modern
> > solid state rig. the 30-L1 keying ckt uses 120 volts for the ant.
relay.
> > I'd strongly suggest you look into the use of "soft keying" setup to
> reduce
> > the keying voltage requirements. you need to look closely at things like
> the
> > filter caps, and any sign of overheating or other damage also.!!!
> > good luck with your project.!!!
> > carl / kz5ca
>
>
>
> --
> No virus found in this outgoing message.
> Checked by AVG Anti-Virus.
> Version: 7.0.300 / Virus Database: 265.7.1 - Release Date: 1/19/2005
>
>
>
> ------------------------------
>
> Message: 7
> Date: Sun, 23 Jan 2005 21:04:49 -0500
> From: Roger D Johnson <n1rj@adelphia.net>
> Subject: [Amps] OT help
> To: "amps@contesting.com" <amps@contesting.com>
> Message-ID: <41F457C1.6000709@adelphia.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> I'd like to thank all those who replied to my problem. I
> downloaded, and tried, several programs but then had a
> flash of insight. Since the graphs are designed to be
> rotated 90 deg for viewing anyway, why not scan them in
> that way to begin with. I tried it and it works fine!
>
> Again thanks to all.
>
> 73, Roger
>
> --
> Remember the USS Liberty (AGTR-5)
> http://ussliberty.org/
>
>
> ------------------------------
>
> Message: 8
> Date: Sun, 23 Jan 2005 18:12:51 -0800
> From: "Mark - AA6DX" <aa6dx@pacbell.net>
> Subject: Re: [Amps] Denton Clipperton L
> To: "Greg Hicks" <gahicks@cox.net>, <amps@contesting.com>
> Message-ID: <010001c501ba$683cb140$7362ce3f@two>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Greg .. those amps are FAMOUS for un-soldering their own components ...
> check for that problem .. a nice hefty iron will cure a bunch of problems!
> I had 2wo of those that did that! 73 .. Mark, AA6DX
>
> ----- Original Message -----
> From: "Greg Hicks" <gahicks@cox.net>
> To: <amps@contesting.com>
> Sent: Saturday, January 22, 2005 7:28 PM
> Subject: [Amps] Denton Clipperton L
>
>
> >I was given a Clipperton L and the guy thought it worked (It did before
he
> > loaned it to someone). It powered up, the four tubes had filament glow.
> > I
> > had plate voltage but no plate current.
> >
> > Driving with 50 watts did not produce any output. After checking for
> > mechanical problems, I found that resistor on one of the tubes loose and
> > repaired. I then found one of the 500 mfd caps bad (after it exploded
> > during testing). With the electrolytic cap out the plate voltage is
> > obviously lower, but still have no plate current.
> >
> > With no drive from the exciter there is no plate current.
> >
> > Any quick suggestions?
> > Greg
> > WM5D
> >
> >
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
>
>
>
>
> ------------------------------
>
> Message: 9
> Date: Sun, 23 Jan 2005 21:26:02 -0500
> From: "Robert W Epling" <no3i@ccia.com>
> Subject: [Amps] AMPLIFIER REPAIRS
> To: <Amps@contesting.com>
> Message-ID: <032401c501bc$0d35b470$32110840@MAIN01>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Hello List
> I am looking for recommendations on who does good amplifier repair work. I
> have a completely modified sb200 set up for 6 meters.I know about Harbachs
> but they are out of business for a while due to wx damages. Any help would
> be appreciated.
> Thanks
> Bob
>
>
>
>
> ------------------------------
>
> Message: 10
> Date: Sun, 23 Jan 2005 22:02:41 -0500
> From: Tony King - W4ZT <amps@w4zt.com>
> Subject: Re: [Amps] AMPLIFIER REPAIRS
> Cc: Amps@contesting.com
> Message-ID: <41F46551.7040809@w4zt.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Try Milton, N4DA, at <http://www.n4da.com>
>
> He does good work, has lots of experience and servicing ham gear is his
> business.
>
> 73, Tony W4ZT
>
> Robert W Epling wrote:
> > Hello List
> > I am looking for recommendations on who does good amplifier repair work.
> > I have a completely modified sb200 set up for 6 meters.I know about
> > Harbachs but they are out of business for a while due to wx damages. Any
> > help would be appreciated.
> > Thanks
> > Bob
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
>
>
>
> ------------------------------
>
> Message: 11
> Date: Mon, 24 Jan 2005 03:27:56 +0000
> From: Tomm Aldridge <KD7QAE@ARRL.NET>
> Subject: [Amps] what is the mu or "amplification factor" of a gs35b???
> To: Amps@contesting.com
> Message-ID: <41F46B3C.2060205@ARRL.NET>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> In trying to use TAP2 program, the question of the amplification factor
> comes up as it is requested in the data entry. I cannot find it speced
> anywhere for the gs35b. Anybody know what it is?
>
>
> ------------------------------
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
> End of Amps Digest, Vol 25, Issue 60
> ************************************
>
>
>
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