>------------------------------------------------------------------------
>
>Today's Topics:
>
> 1. Re: Arcing
> 2. Re: Why hasn't solid state replaced tubes? (Tom Rauch)
> 3. Re: Arcing (Tom Rauch)
> 4. 4CX1600B vs. GU84B (Jeff Maass)
> 5. Re: Arcing (rlm)
> 6. Re: Arcing (rlm)
> 7. Re: Why hasn't solid state replaced tubes? (rlm)
> 8. B&W LPA-1 (john)
> 9. Re: 4CX1600B vs. GU84B (Ian White, G3SEK)
> 10. B & W Amp (k7fm)
> 11. Re: 4CX1600B vs. GU84B (Tom Rauch)
> 12. Re: 4CX1600B vs. GU84B
> 13. Re: Arcing (on4kj)
>
>
>
>
> ------------------------------------------------------------------------
>
> Subject:
> [Amps] 4CX1600B vs. GU84B
> From:
> "Jeff Maass" <jmaass@columbus.rr.com>
To: <amps@contesting.com>
> Date:
> Sat, 8 Mar 2003 07:12:58 -0500
> To:
> "Amps Mailing List" <amps@contesting.com>
>
>
>My club has, courtesy of Ten Tec, a Ten Tec Titan II, which uses
>the Svetlana 4CX1600B. This tube has become expensive and
>scarce, and we are looking for an affordable spare 4CX1600B, or
>an affordable alternative.
>
>I've seen some references that identify the Svetlana GU84B as
>being the military analog, with a bit more dissipation rating, but
>needing more cooling air.
>
>Are they pin compatible? Can the GU84B be used in a 4CX1600B
>amp without (or with) modifications?
>
>Anyone have a 4CX1600B at a reasonable price, or know of one?
>
> Jeff Maass jmaass@columbus.rr.com Located near Columbus Ohio
> USPSA # L-1192 NROI/CRO Amateur Radio K8ND
>Maass' IPSC Resources: http://home.columbus.rr.com/jmaass/index.html
>Circleville USPSA/IPSC: http://home.columbus.rr.com/jmaass/pcsiipsc.htm
>
>
>
> Hey Jeff
http://www.nd2x.net/base-1.html
http://www.angelfire.com/nb/ni4l/gu84b.html
I am currently homebrewing a GU-84B amp
It is not the same as the 4cx1600
It is the same as the 4CX2500
Yes there are is some misleading data about this tube on some of the sites .
Maybe these links will help you out.
Chris NI4L
>
> ------------------------------------------------------------------------
>
> Subject:
> Re: [Amps] 4CX1600B vs. GU84B
> From:
> "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>
To: <amps@contesting.com>
> Date:
> Sat, 8 Mar 2003 13:52:45 +0000
> To:
> amps@contesting.com
>
>
> Jeff Maass wrote:
>
>>
>> My club has, courtesy of Ten Tec, a Ten Tec Titan II, which uses
>> the Svetlana 4CX1600B. This tube has become expensive and
>> scarce, and we are looking for an affordable spare 4CX1600B, or
>> an affordable alternative.
>>
>> I've seen some references that identify the Svetlana GU84B as
>> being the military analog, with a bit more dissipation rating, but
>> needing more cooling air.
>>
>
> Some of these cross-references are vague to the point of being
> misleading (for example, some people call the GS35b a "Russian 8877",
> which it certainly isn't).
>
> www.nd2x.net is the best source for data on Russian tubes, and it also
> features practical amplifiers. Data sheets are at:
> http://www.nd2x.net/tube-1.html
>
> The 4CX1600B data sheet is on the Svetlana site, at:
> http://www.svetlana.com/graphics/products/pdf/4CX1600B.pdf
>
>> Are they pin compatible?
>
>
> The four grid pins look similar, but the central heater connection
> looks slightly different.
>
>> Can the GU84B be used in a 4CX1600B
>> amp without (or with) modifications?
>
>
> "Maybe with" seems to be the answer.
>
>
>
> ------------------------------------------------------------------------
>
> Subject:
> [Amps] B & W Amp
> From:
> "k7fm" <k7fm@teleport.com>
To: <amps@contesting.com>
> Date:
> Sat, 8 Mar 2003 05:59:34 -0800
> To:
> <amps@contesting.com>
>
>
>Hello John:
>
>Well, I sort of do have experience. I built a home built copy, which I used
>for many years. It is a reliable amp, but there are some considerations.
>
>First, the plate dissipation of the 813's are 125 watts each. Total 250
>watts. This is a pretty conservative rating, and putting air on them helps.
>My amplifier actually used 3 tubes and I kept it at about 600 watts out, but
>could get 750 - 800 easily. Never failed.
>
>Second, this was designed during the tube era and there is no cathode input
>filter. So, there is a lot of variation in load to the transceiver. A
>tuned input would be a good addition, or you could use an auto tuner next to
>the input, or you could use a manual tuner just before the input.
>
>Third, there is no antenna chanceover relay, so you need to do your own.
>
>The 813 tubes will be available long after some of the modern tubes
>disappear. That is the problem with these modern wars, they do not provide
>us with ham equipment for the next 60 years. WWII was the last great ham
>supplier.
>
>73, Colin K7FM
>
>
>
>---
>Outgoing mail is certified Virus Free.
>Checked by AVG anti-virus system (http://www.grisoft.com).
To: <amps@contesting.com>
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>
>
>
>
> ------------------------------------------------------------------------
>
> Subject:
> Re: [Amps] 4CX1600B vs. GU84B
> From:
> "Tom Rauch" <w8ji@contesting.com>
To: <amps@contesting.com>
> Date:
> Sat, 8 Mar 2003 09:05:56 -0500
> To:
> "Jeff Maass" <jmaass@columbus.rr.com>, "Amps Mailing List"
> <amps@contesting.com>
>
>
>>My club has, courtesy of Ten Tec, a Ten Tec Titan II, which uses
>>the Svetlana 4CX1600B. This tube has become expensive and
>>scarce, and we are looking for an affordable spare 4CX1600B, or
>>an affordable alternative.
>>Anyone have a 4CX1600B at a reasonable price, or know of one?
>>
>>
>
>I have several new 4CX1600 tubes.
>
>I will trade one or more of them for some nice old decent boat anchor gear.
>
>73 Tom
>
>
>
> ------------------------------------------------------------------------
>
> Subject:
> Re: [Amps] 4CX1600B vs. GU84B
> From:
> W2fca@cs.com
To: <amps@contesting.com>
> Date:
> Sat, 8 Mar 2003 09:59:41 EST
> To:
> amps@contesting.com
>
>
>In a message dated 3/8/03 12:16:06 Greenwich Standard Time,
>jmaass@columbus.rr.com writes:
>
><< Are they pin compatible? Can the GU84B be used in a 4CX1600B
> amp without (or with) modifications?
> >>
>It sems to me the military analog is the gu91b, which I've seen listed as a
>4CX1600A. The anode is smaller, though. The 1600B is the size of an 8877, the
>1600A is the size of a 4CX800
>
>Frank
>W2FCA
>
>
>
> ------------------------------------------------------------------------
>
> Subject:
> Re: [Amps] Arcing
> From:
> "on4kj" <on4kj@skynet.be>
To: <amps@contesting.com>
> Date:
> Sat, 8 Mar 2003 14:44:08 +0100
> To:
> "rlm" <2@vc.net>, "Jeffrey Madore" <K1LE@arrl.net>, " AMPS"
> <amps@contesting.com>
>
>
>----- Original Message -----
>From: "rlm" <2@vc.net>
>To: "Jeffrey Madore" <K1LE@arrl.net>; " AMPS" <amps@contesting.com>
>Sent: Saturday, March 08, 2003 12:10 PM
>Subject: Re: [Amps] Arcing
>
>
>
>
>>>...
>>>
>>>
>>Tom Rauch:
>>
>>
>>>>>As you learned, an open termination on a current transformer can
>>>>>
>>>>>
>produce
>
>
>>>>>some large voltages!! But no more that the turns ratio of the
>>>>>
>>>>>
>transformer
>
>
>>>>>and operating voltage would indicate.
>>>>>
>>>>>
>>Me:
>>
>>
>>>>** it is my opinion that the counter-EMF spike can be many times the
>>>>rated primary operating V.
>>>>
>>>>
>>>Yes, Rich, this has always been my understanding also. In fact, it's
>>>difficult to define the extent of the CT primary, to determine the
>>>
>>>
>voltage.
>
>
>>>The cable may connect from one phase of a power transformer to a bus
>>>
>>>
>feeder
>
>
>>>breaker 300 ft away. It seems there's always more to things than first
>>>
>>>
>meets
>
>
>>>the eye. I once listened to a man lecture on "motor stator insulation"
>>>
>>>
>for 2
>
>
>>>solid days...and he kept my attention! It seemed he lived for motor
>>>
>>>
>stators!
>
>
>>>A life like that is for people who don't know how to fish.
>>>
>>>Jeff
>>>
>>>
>>>
>>When DC current abruptly stops, the potential for reverse potential is
>>impressive. I've measured 400v-pk with an o'scope across 24vdc relay
>>coils. I would like to hear Mr. Rauch's explanation of why the operating
>>voltage limits reverse potential.
>>***
>>
>>
>
>*** Remember the Fourier Analyse of a square wave.
>Transition phenomena are very near of square wave, the seventh harmonic
>,there are only the odd onces, has the highest peak, often much more the ten
>times the original value.
>" Whats in a name Mathematics......."..but already 40 years ago...;
>
>Jos
>
>
>
>>Ever tried fishin' in the amazon? I understand there's a eel-like fish
>>named Electrophorus electricus in there that can do 1kV @ 1A when full
>>grown to c. 6-ft. Presumably, a carbon-fiber fishing rod is not a wise
>>choice
>>
>>cheerz, Jeff
>>
>>
>>- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
>>www.vcnet.com/measures.
>>end
>>
>>_______________________________________________
>>Amps mailing list
>>Amps@contesting.com
>>http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>>
>>
>
>
>
>
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