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Author Topic: Yaesu FL2100Z linear  (Read 3012 times)
VE7ALQ
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Posts: 349




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« on: September 29, 2004, 01:11:58 AM »

Can anyone tell me what tubes are used by the Yaesu FL2100Z Linear, and what bands the linear covers?  I currently own a Yaesu FL2100B Linear which has a pair of 572B/T160L tubes in it, and covers 80,40,20,15,10 meters only.  I have heard gossip that the FL2100Z covers 160 meters and the WARC bands in addition to the standard 80,40,20,15,10 meter bands and uses 572B/T160L tubes.  Is this true?  How often are FL2100Z linears put up for sale and what is a typical asking price?
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N3ZKP
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« Reply #1 on: September 29, 2004, 12:01:45 PM »

The 2100Z uses the same pair of 572s as the B model.

This took less than 20 seconds to find out in a Google search.

There is also a site from the search that has the manual for it.

I'll leave the rest to you to find. It's not hard to find out stuff on your own if you take a few minutes and try. Smiley

Lon
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VE7ALQ
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« Reply #2 on: September 29, 2004, 02:26:09 PM »

Yes, I was aware that the FL2100Z used the 572B/T160L

I did the GOOGLE search but I was unable to download a manual from the site that GOOGLE claimed had a manual

What I really want to know is - does the FL2100Z support 160 meters and the WARC bands?  GOOGLE didn't help me.

I have an FL2100B which works great.  Only covers the 80,40,20,15,10 meter bands, no coverage for 160,30,17,12 meter bands. I was hoping the FL2100Z would cover these.  We are permitted to use a linear on 30 meters in Canada.

Kind of frightened by the fellow who installed a set of Taylors that had an "air bubble" in the neck, replaced with another set of Taylors which didn't work.  I have four "matched" Taylor 572B/T160L on order from RF-Parts.
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VE7ALQ
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« Reply #3 on: September 29, 2004, 02:36:30 PM »

Located the manual, but it is in a non-standard format that requires its own proprietary viewer.  I do not run Micro$oft Windows so the proprietary viewer won't work. This makes the manual file useless for me.

Everywhere else I have seen manuals, they are in Adobe Acrobat (.pdf) format files.  Not here...
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N3ZKP
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« Reply #4 on: September 29, 2004, 08:35:19 PM »

I am not trying to be difficult, but ...

<< Yes, I was aware that the FL2100Z used the 572B/T160L >>

Then why did you ask that in the very first line of the first posting  if you already knew the answer? Basically you wasted my time, looking up and providing you the answer to a question you already knew but asked anyway.

There were two manual sites with .pdf files on them. No I don't remember which ones and I really don't feel inclined to find them again.

Lon

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VE7ALQ
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« Reply #5 on: September 29, 2004, 10:39:44 PM »

Sorry, my friend, but my GOOGLE searching came up with ZIP when looking for Adobe Acrobat .pdf manual image files.  However I _did_ find the answer to my question re WARC bands and 160 meters by asking Yaesu directly.  They told me that the FL2100Z did indeed cover 160 meters and the WARC bands.  Questions answered, I'm happy (and looking for a Yaesu FL2100Z linear)  I also found out that you can use Svetlana 572B/T160L tubes in the FL2100Z without butchering that linear.
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W9GB
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« Reply #6 on: October 01, 2004, 06:16:25 AM »

RF Parts has all of the Svetlana information (pictures of difference of 572B tubes, neutralization changes - when required, etc.) on using these tubes in Yaesu 2100 series amplifiers.

w9gb
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K0RS
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« Reply #7 on: October 05, 2004, 03:29:57 AM »

http://www.hamdirectory.info/schemi/FL2100Z_user.pdf
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W8JI
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« Reply #8 on: October 07, 2004, 07:01:58 AM »

Good luck on the FL2100.

IMO, it is a piece of garbage. I just looked at one for a friend and it oscillated on both HF and near 100 MHz. The layout is terrible, and the neutralization scheme is nonsense. You can't simply throw a capacitor from the output of an adjustable pi to the input of the tube and call it "neutralization". After looking at it, I concluded the designer was not famililar at all with high power RF.

Compounding this problem is most 572B's are now junk. At Ameritron, more than 50% of all new Svetlana 572's had low voltage breakdown. They arced at about 4500 volts, and the peak operating voltage in normal class AB is nearly twice the dc voltage with PERFECT tuning. That means a new Svetlana tube would be very marginal with more than 1800 volts or so DC anode voltage.

You need to have a breakdown of about 3-4 times the dc anode voltage to be safe. I ran through about six Chinese Taylor tubes to find two that handled 7000 volts on the highpot. That means the FL2100 was marginally OK with those two tubes at normal voltage.

If you already have one, I wouldn't throw it away....but I would avoid buying more. I think eventually poor quality tubes will drive the tube PA's from use, as people get sick of replacing bad new tubes.

By the way, the test papers I have from a Chinese manufacturer show the 572's as being tested for leakage at 1800 volts. The old Cetron test paper I have specified 8kV. This explains why tubes arc.  

73 Tom
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WB2WIK
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« Reply #9 on: October 07, 2004, 09:03:14 AM »

"This explains why tubes arc."

Yeah, but Tom, the Chinese tubes come with a little rolled up fortune inside!

Like, "He who uses 572Bs at full voltage end up buying more of same."

WB2WIK/6
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WIRELESS
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« Reply #10 on: October 07, 2004, 01:07:31 PM »

Cetron still makes 572's in China and are sold under the National label.  Richardson has owned Cetron for years and moved 572 manufacturing to China a few years ago.  The National brand is made to Cetrons standards.
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K0IZ
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« Reply #11 on: October 26, 2004, 10:19:31 AM »

I'm using four chinese 572B's in my 30L1, no load voltage 2000 volts.  Bought from Penta Labs, matched quad for $140.  Absolutely no problems.
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VA3UL
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« Reply #12 on: November 22, 2004, 03:46:51 AM »

The FL2100Z is a great amp. Yes it does have all the bands including WARC and is basically the same as the 2100B with refinements. It uses as with the 2100B two 572B tubes. I bought mine used and it has a pair of Taylor finals and it work great.


73 Dave
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