>Date: Wed, 29 Mar 2006 15:50:40 -0500
>To: David Kirkby <david.kirkby@onetel.net>
>From: Bill Fuqua <wlfuqu00@uky.edu>
>Subject: Re: [Amps] Could we *all* use the right tube part numbers?
>
>I have a 3CV200,000D3/ML-7482 in the garage.
>It has cured my compulsion to buy big power tubes. At least for now.
> I bet you don't have a single DB9 connector in your shack.
>
>73
>Bill wa4lav
>
>
>At 03:09 AM 2/15/2005 +0000, you wrote:
>>A search of the web shows many people are writing mails, web pages about
>>non-existent tubes. Apart from being a bit sloppy, it does create
>>problems when people try to search for material on the web. It would be
>>far better if we *all* used the *right* part numbers.
>>
>>The non-existent 3CX150000B7 is one such example. A search on Google
>>shows 118 entries for that - some by me I might add!!! A search for the
>>correct part number - 3CX15,000B7 (note the comma)
>>
>>http://www.cpii.com/eimac/catalog/80094.htm
>>
>>shows only 24 entries. So the wrong part number is listed far more often
>>than the right one!! But Google will only pick up what you ask it for.
>>
>>The 4CX250 is another example. There are lots of articles, emails etc
>>when people mention they are running a pair of 4CX250's. In most cases
>>they probably mean 4CX250B's, but this is not always stated. There are
>>about twice as many entries in Google for the 4CX250B than for the
>>4CX250, so the situation is nowhere near as bad as it is for the poor old
>>3CX15,000B7 which normally gets called by the wrong name.
>>
>>
>>Even manufacturers of amplifiers - for example Alpha
>>http://www.alpha-amps.com/html/legacy.htm
>>call the 8877 a 3CX1500, when in fact it's a 3CX1500A7.
>>
>>There's a thread on here at the minute where people are talking about a
>>3500Z. I assume they mean the 3-500Z
>>http://www.g8wrb.org/data/Eimac/3-500Z.pdf
>>but perhaps not. Other web references refer to the 3500-Z. So we have a
>>mixture of
>>
>>3-500Z
>>3500Z
>>3500-Z
>>
>>and I expect with a bit of effort I could find some other combination.
>>
>>You might think I'm nit-picking, but I'm sure people looking for
>>information on the 3-500Z are not very likely to type 3500Z in a search
>>engine. (If they do, they will get lots of references, but most are
>>nothing to do with the tube).
>>
>>Looking at my own site this month, the most popular search terms are
>>listed at the bottom of the message, in order (most common at the top).
>>The 4CX350A is the most popular search term used when arriving at my site
>>from a search engine so far this month.
>>
>>There are no entries at all for a 4CX350, as I did not have such a
>>non-existent tube listed on the site. So no search engine would have
>>found my site if you had searched for 4CX350. However, a quick web search
>>shows that the number of references to a 4CX350, without any suffix are
>>very significant. There are:
>>
>>4CX350F - 343 entries on Google.
>>4CX350A - 867 entries on Google
>>4CX350FJ - 122 entries on Google
>>4CX350AC - 196 entries on Google.
>>
>>4CX350 - 354 entries on Google.
>>
>>So ignoring any rare varients, there 19% of the web references to a
>>non-existent device, with the remaining 81% referring to the A, F, AC or
>>FJ versions.
>>
>>I know sometimes might want to refer to the 4CX250 series, but there is a
>>lot of mis-use of tube part numbers, which can't really be good for anyone.
>>
>>Eimac don't seem too consistent with the YC tubes. Some have a hyphen
>>after the YC, some don't. Whether or not the tube data sheet and the tube
>>are always consistent I don't know.
>>
>>I feel we should all try to use the right part number, and not not refer
>>to a 3CX1500 if we mean an 8877 / 3CX15000A7.
>>
>>
>>I admit to being guilty of this myself, but now I run a web server, and
>>look at the server logs, the searches people perform on my site, and the
>>search terms they arrive at the site from, I do feel we could do with
>>being a bit more accurate.
>>
>>Dave Kirkby, G8WRB
>>
>>
>>
>>Search terms in 1-15th Feb 2005 at www.g8wrb.org
>>------------------------------------------------
>>4cx350a // Last month, the top spot was held by the 3CX800A7, which was
>>searched for 55 times.
>>yc156
>>4cx250b
>>eimac
>>yagi uda
>>yc-156
>>3cx800a7
>>eimac 8875
>>yagi-uda antenna
>>6bm8
>>yagi-uda
>>amperex
>>yagi uda antenna
>>eimac 3-1000z
>>4cx1500b
>>3cx5000a7
>>4cx350f
>>4cx5000a
>>3cx3000a7
>>yagi uda design
>>2c39a
>>4cx250b data sheet
>>3cx1500d7
>>yc179
>>eimac 4cw10000a
>>8877 linear
>>8874 tube life
>>3cpx5000a7 yc156
>>tube data
>>4cx20000a
>>yc156 data
>>svetlana 572b tube data
>>and so on....
>>
>>--
>>Dr. David Kirkby, G8WRB
>>
>>Please check out http://www.g8wrb.org/ of if you live in Essex
>>http://www.southminster-branch-line.org.uk/
>>
>>
>>
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