Thanks for dope Rich - very interesting. And Svetlana was the light of
Stalin then?
Regarding the 2K3 and 3-500Z I have asked about this before on this net. I
have the PHILIPS YD 1130 made at the same time as the first graphite EIMAC
3-500Z used in the SB 220 of 1968-69. The anodes of my YD 1130 look exactly
the same as the old EIMAC graphite anodes in this 2K3 and have 5 bulges.
Maybe the PHILIPS tubes are slightly taller.
The YD 1130 PHILIPS data sheet of 1966 is almost the same as EIMAC 3-400Z of
1965. So, you are right Rich. Are the present 3-500ZG made in France (?) =
YD1130 of around 1965-70? Is then the present 3-500ZG in fact a 3-400Z not a
3-500Z?
What burn-in time is recommended for the YD 1130 an old unused tube.
de Hans
----------
>Från: measures <2@vc.net>
>Till: "UT7CT --> Anton Koval" <tony@uch.net>, "sm5ki" <sm5ki@algonet.se>,
"AMPS" <amps@contesting.com>, "Steve Bookout" <nj4f@erols.com>
>Ämne: Re: [AMPS] 4CX800's vs 4CX1600
>Datum: sön 27 feb 2000 14.36
>
>
>>
>>Svetlana has been on the market since the late 19th century. Quality is the
>>main avantage I think...
>>
>''svetlana'' means ''light''. The Svetlana company was supposedly making
>light bulbs before Lee De Forrest patented the triode electron tube in
>1907. .
>>
>>-----Èñõîäíîå ñîîáùåíèå-----
>>Îò: sm5ki <sm5ki@algonet.se>
>>Êîìó: UT7CT --> Anton Koval <tony@uch.net>; amps@contesting.com
>><amps@contesting.com>; Steve Bookout <nj4f@erols.com>
>>Äàòà: 27 ôåâðàëÿ 2000 ã. 9:38
>>Òåìà: SV: [AMPS] 4CX800's vs 4CX1600
>>
>>
>>>I have often been wondering why have the match problem of two 4CX800 tubes?
>>>Would it not be better to always use one 4cx1600B tube? Of course the latter
>>>tube will easier generate parasitics because its ability to amplify at
>>>higher frequencies than the 4CX800.
>>>
>>>By the way, when is SVETLANA coming out with a direct replacement of the
>>>3-500Z? There has been rumours of a 3-600Z tube, I heard. Since EIMAC
>>>stopped manufacturing the tube it is very difficult to find anything similar
>>> reliable on the market.
>
>Triton is apparently making tubes that are remarkably similar to late
>production Eimac 3-500Zs. To explain: During the time that Eimac 3-500Zs
>were made in Salt Lake City, many tubes were seemingly produced with
>defective anode cooler welds. With normal use, the defective welds would
>eventually let the anode cooler drop on the grounded-grid. Defective
>spotwelds were caused by not using enough spotweld current. After Triton
>purchased Eimac's glass-tube division, Triton reportedly began producing
>tubes with defective anode cooler spotwelds. Hopefully, the problem has
>been fixed. Chinese metal-cooler 3-500Z/8008s apparently do not have
>this problem. Graphite anode-cooler tubes have no such problem.
>
>>> I recently saw a HENRY 2K3 with the original
>>>graphite 3-500Zs from early sixties in good shape.
>
>Are you certain they weren't 3-400Zs?
>
>cheers
>-----------
>>>
>>>Why buy SVETLANA 3cx800s when EIMAC has a much longer manufacturing
>>>experience? The very small price difference does not motivate buying
>>>SVETLANA. Or is their quality higher?
>>>
>>>Is there, by the way, a reliable source for 3CX1000A7s with sockets?
>>>
>>>
>>> Hans/SM5KI
>>>
>>>
>>>----------
>>>>Från: "UT7CT --> Anton Koval" <tony@uch.net>
>>>>Till: <amps@contesting.com>, "Steve Bookout" <nj4f@erols.com>
>>>>Ämne: Re: [AMPS] 4CX800's vs 4CX1600
>>>>Datum: lör 26 feb 2000 23.41
>>>>
>>>
>>>>
>>>> Dear Steve,
>>>>
>>>> The 4CX800A (GU-74B) tube is rated at about 800 W, the 4CX1600
>>(GS-23B)
>>>>is rated at 1600 - 2000 W and works well over 1000 mHz.
>>>> More technical data in English can be found at my site at
>>>>http://www.qsl.net/ut7ct
>>>> 73 !
>>>>-----------
>>>>UT7CT Ham Radio Devices - Fine range of CT
>>>>Hand Keys & Paddles. Collectable keys. Svetlana
>>>>PA tubes and much more at http://www.qsl.net/ut7ct
>>>>tony@uch.net ICQ#19487420
>>>>
>>>>
>>>>-----Èñõîäíîå ñîîáùåíèå-----
>>>>Îò: Steve Bookout <nj4f@erols.com>
>>>>Êîìó: amps@contesting.com <amps@contesting.com>
>>>>Äàòà: 27 ôåâðàëÿ 2000 ã. 1:40
>>>>Òåìà: [AMPS] 4CX800's vs 4CX1600
>>>>
>>>>
>>>>>
>>>>>Hello all,
>>>>>
>>>>>Anyone care to comment on what the advantages/disadvantages of either
>>tube
>>>>>arrangement in an amp, all other things being relatively equal.
>>>>>
>>>>>I would expect mainly the cost.
>>>>>
>>>>>73 de Steve, NR4M
>>>>>
>>>>>---------------------------------------------
>>>>>Steve Bookout, NR4M (ex NJ4F)
>>>>>Rapidan Data Systems
>>>>>
>>>>>'DX4WIN...The way logging programs should be!'
>>>>>Free demo at http://www.erols.com/pvander
>>>>>
>>>>>--
>>>>>FAQ on WWW: http://www.contesting.com/ampsfaq.html
>>>>>Submissions: amps@contesting.com
>>>>>Administrative requests: amps-REQUEST@contesting.com
>>>>>Problems: owner-amps@contesting.com
>>>>>Search: http://www.contesting.com/km9p/search.htm
>>>>>
>>>>>
>>>>
>>>>
>>>>--
>>>>FAQ on WWW: http://www.contesting.com/ampsfaq.html
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>>>>
>>>>
>>>
>>
>>
>>--
>>FAQ on WWW: http://www.contesting.com/ampsfaq.html
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>>
>>
>
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