From jfornear at earthlink.net  Sat Dec  3 20:07:35 2016
From: jfornear at earthlink.net (Jack)
Date: Sat, 3 Dec 2016 20:07:35 -0500
Subject: [Heath] User Manual
Message-ID: <E7BC535D-AADF-4D2C-877D-AB6B84B25085@earthlink.net>

Does anyone know where I can get a users manual for the SB-1400 he transceiver? I've looked all over the net and can't find one. 

Thanks, jack K9VLX


Sent from my iPad

From w9dz at yahoo.com  Sun Dec  4 12:16:42 2016
From: w9dz at yahoo.com (Allen Jones)
Date: Sun, 4 Dec 2016 17:16:42 +0000 (UTC)
Subject: [Heath] User Manual
In-Reply-To: <E7BC535D-AADF-4D2C-877D-AB6B84B25085@earthlink.net>
References: <E7BC535D-AADF-4D2C-877D-AB6B84B25085@earthlink.net>
Message-ID: <1205020659.6201400.1480871802540@mail.yahoo.com>

Tried to reply direct to sender but email rejected so will try again to the whole group ....
The SB-1400 and the Yaesu FT-747GX are one in the same. ?If unable to find the SB1400 manual the 747 manual will give you all the same info.
Allen, W9DZ

 
      From: Jack <jfornear at earthlink.net>
 To: heath at puck.nether.net 
 Sent: Saturday, December 3, 2016 7:07 PM
 Subject: [Heath] User Manual
   
Does anyone know where I can get a users manual for the SB-1400 he transceiver? I've looked all over the net and can't find one. 

Thanks, jack K9VLX


Sent from my iPad
_______________________________________________
Heath mailing list
Heath at puck.nether.net
https://puck.nether.net/mailman/listinfo/heath


   
 
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From doverta at bellsouth.net  Sun Dec  4 12:40:34 2016
From: doverta at bellsouth.net (Tom Dover)
Date: Sun, 4 Dec 2016 17:40:34 +0000 (UTC)
Subject: [Heath] Heath SB1400 Manual
References: <737948168.6197037.1480873234361.ref@mail.yahoo.com>
Message-ID: <737948168.6197037.1480873234361@mail.yahoo.com>

I tried to respond direct but it bounced... Vintage manuals has a reproduction for $22
Here is the linkHeathkit SB-1400 Manual from Vintage Manuals, Inc.

  
|  
|   
|   
|   |    |

   |

  |
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Heathkit SB-1400 Manual from Vintage Manuals, Inc.
   |   |

  |

  |

 

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From cl350rr at hotmail.com  Sun Dec  4 11:05:01 2016
From: cl350rr at hotmail.com (R Layton)
Date: Sun, 4 Dec 2016 16:05:01 +0000
Subject: [Heath] Heathkit AA100 Stereo Amp and AJ-12 FM Tuner
Message-ID: <SN1PR20MB0255B5451D5B449331893317F6800@SN1PR20MB0255.namprd20.prod.outlook.com>

For Sale: Heathkit AA100 Stereo Amp and AJ-12 FM Tuner


Amp: untested, as found.  previous owner says it was in use daily in a warehouse work area.  all tubes, correct knobs present. face and case look good.


Tuner: tested and working, tuning eye works and is bright.  case and dial are in good condition.


$200 for the pair


Located in Virginia Beach VA.


will deliver to your shipper for packing and shipping.


cl350rr at hotmail.com
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From stg57 at yahoo.com  Sun Dec  4 19:46:46 2016
From: stg57 at yahoo.com (James)
Date: Mon, 5 Dec 2016 00:46:46 +0000 (UTC)
Subject: [Heath] User Manual
In-Reply-To: <1205020659.6201400.1480871802540@mail.yahoo.com>
References: <E7BC535D-AADF-4D2C-877D-AB6B84B25085@earthlink.net>
 <1205020659.6201400.1480871802540@mail.yahoo.com>
Message-ID: <1582778025.5681143.1480898806835@mail.yahoo.com>

Got rejected this morning on my reply, so also to whole group.

Hi Jack,

Not totally sure about where to get one,? once the holiday season is over and I don't have to work 7 day work weeks, I can try and scan mine, which is just a copy I got with mine.??
It is basically a Yeasu Ft-747 which there are free downloads off the web. The heath does not have the internal speaker, and some buttons are in different places. The SB-1400 was a finished product and not the standard heathkit kit project.
Have been using mine as my main rig lately, made up a digital cable for my signallink, and looking to build a CAT cable to hook up the logging software.
Hit me up direct in January and i will see if I can get some good scans

73?
James WS4JH?
 

    On Sunday, December 4, 2016 5:14 PM, Allen Jones via Heath <heath at puck.nether.net> wrote:
 

 Tried to reply direct to sender but email rejected so will try again to the whole group ....
The SB-1400 and the Yaesu FT-747GX are one in the same. ?If unable to find the SB1400 manual the 747 manual will give you all the same info.
Allen, W9DZ

 
      From: Jack <jfornear at earthlink.net>
 To: heath at puck.nether.net 
 Sent: Saturday, December 3, 2016 7:07 PM
 Subject: [Heath] User Manual
  
Does anyone know where I can get a users manual for the SB-1400 he transceiver? I've looked all over the net and can't find one. 

Thanks, jack K9VLX


Sent from my iPad
_______________________________________________
Heath mailing list
Heath at puck.nether.net
https://puck.nether.net/mailman/listinfo/heath


   
 
_______________________________________________
Heath mailing list
Heath at puck.nether.net
https://puck.nether.net/mailman/listinfo/heath


   
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From randyk44 at sbcglobal.net  Mon Dec  5 08:54:52 2016
From: randyk44 at sbcglobal.net (Randy Kaeding)
Date: Mon, 5 Dec 2016 13:54:52 +0000 (UTC)
Subject: [Heath] User Manual
References: <1705939426.5961772.1480946092181.ref@mail.yahoo.com>
Message-ID: <1705939426.5961772.1480946092181@mail.yahoo.com>

There is a slight difference.

In the SB-1000, we brought the FAST/SLOW AGC switch out to the front panel. In the 747, it is a switch on the main board.

I don't know if the 747 has a front panel speaker. Anyway, the SB-1400 does not.

I don't remember what it is, but there is a capacitor value change on the front panel circuit board that improves the audio.

I had the privilege of doing the Heathkit manual for the transceiver.

Randy, K8TMK

--------------------------------------------
On Sun, 12/4/16, Allen Jones via Heath <heath at puck.nether.net> wrote:

 Subject: Re: [Heath] User Manual
 To: "heath at puck.nether.net" <heath at puck.nether.net>
 Date: Sunday, December 4, 2016, 12:16 PM
 
 Tried
 to reply direct to sender but email rejected so will try
 again to the whole group ....
 The
 SB-1400 and the Yaesu FT-747GX are one in the same. ?If
 unable to find the SB1400 manual the 747 manual will give
 you all the same info.
 Allen,
 W9DZ
 
     
   From: Jack
 <jfornear at earthlink.net>
  To:
 heath at puck.nether.net 
  Sent: Saturday,
 December 3, 2016 7:07 PM
  Subject: [Heath] User
 Manual
    
 Does anyone know where I can get a users manual
 for the SB-1400 he transceiver? I've looked all over the
 net and can't find one. 
 
 Thanks, jack K9VLX
 
 
 Sent from my iPad
 _______________________________________________
 Heath mailing list
 Heath at puck.nether.net
 https://puck.nether.net/mailman/listinfo/heath
 
 
  
   
 -----Inline Attachment Follows-----
 
 _______________________________________________
 Heath mailing list
 Heath at puck.nether.net
 https://puck.nether.net/mailman/listinfo/heath
 

From wb4lnm at aol.com  Mon Dec  5 14:58:55 2016
From: wb4lnm at aol.com (John Klingelhoeffer)
Date: Mon, 5 Dec 2016 14:58:55 -0500
Subject: [Heath] SB-1000 / FT-747GX Service Manual
Message-ID: <158d091574e-6acd-8ed4@webprd-m44.mail.aol.com>

The service manual for the FT-747GX can be found in a sub-directory at:  


http://w5jgv.com/downloads/FT-747.


If the Heath model is packaged like the FT-747GX, I suggest looking first at the service manual to determine how to remove the case for internal repairs.  With finesse and knowing what to do first, it comes apart very easily and with no damage.  If one tries to brute-force the removal, breakage will surely occur.   



They are very nice little radios, and extremely lightweight, just over 7 pounds.  I use mine with an MFJ switching power supply in a Harbor Freight aluminum briefcase as my HF travel transceiver.  It and all accessories easily fit in one case.  


73       John...   WB4LNM                  "One of the hams from Heath"


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From jfornear at earthlink.net  Mon Dec  5 15:34:30 2016
From: jfornear at earthlink.net (Jack)
Date: Mon, 5 Dec 2016 15:34:30 -0500
Subject: [Heath] SB-1400 manual
Message-ID: <7B33CB3E-8F4E-49B6-A416-3AE4136BA83E@earthlink.net>

Thank you everyone for all of the answers. What a great bunch of guys! I'm now ready to dig into the transceiver that I just bought and see if it works.

Jack 



Sent from my iPad

From randyk44 at sbcglobal.net  Mon Dec  5 20:09:14 2016
From: randyk44 at sbcglobal.net (Randy Kaeding)
Date: Tue, 6 Dec 2016 01:09:14 +0000 (UTC)
Subject: [Heath] SB-1400 manual
References: <2041593038.45054.1480986554917.ref@mail.yahoo.com>
Message-ID: <2041593038.45054.1480986554917@mail.yahoo.com>

I had another thought.

Mine exhibited an occasional problem with the unit failing a while after warm-up. Freeze mist found the problem to be a bad ceramic disk capacitor on the small 2" x 2" (approx.) circuit board. Changing the part didn't fix the problem.

I put up with the problem for a while, but one day decided to google the problem and see what I could find. Apparently there is a circuit board feed-through hole problem under the connector near the above-mentioned capacitor. A quick fix with a piece of wire corrected the problem,

Hope this is good to know.

Randy, K8TMK


--------------------------------------------
On Mon, 12/5/16, Jack <jfornear at earthlink.net> wrote:

 Subject: [Heath] SB-1400 manual
 To: Heath at puck.nether.net
 Date: Monday, December 5, 2016, 3:34 PM
 
 Thank you everyone for all of the
 answers. What a great bunch of guys! I'm now ready to dig
 into the transceiver that I just bought and see if it
 works.
 
 Jack 
 
 
 
 Sent from my iPad
 _______________________________________________
 Heath mailing list
 Heath at puck.nether.net
 https://puck.nether.net/mailman/listinfo/heath
 

From kgordon2006 at frontier.com  Thu Dec  8 19:27:00 2016
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Fri, 09 Dec 2016 00:27:00 -0000
Subject: [Heath] SB-200 loading question.
Message-ID: <5849FA54.8259.6D2B37F9@kgordon2006.frontier.com>

I am somewhat confused here and I hope someone can help:

I am refurbishing an SB-200 for a friend. 

In this amp, C-27, the fixed 500 pfd 2 KV mica capacitor which is switched in parallel with 
the loading capacitor C-28A/B on 80 meters where additional loading capacitance is 
needed, especially on the low end of the band, had been replaced with a 525 pfd "door 
knob" capacitor capable of at least 5 KV. This "door knob" is a large one and I think it is 
actually either a 10KV or 25KV job.

It checks out with my cap meter perfectly.

While using this amp, with new finals, on the low end of 80 meters, I "run out" of loading 
capacitor before achieving full load. I.e., the loading capacitor is up against the full-
capacitance stop.

The antenna is being fed through a home-brew antenna coupler, and the SWR between the 
amplifier and the coupler is 1:1.

I then paralleled that "door-knob" capacitor with a 500 pfd 2KV mica, and STILL run out of 
loading capacitance on the low end of 80 meters.

The amp works perfectly and properly on all other bands and frequencies.

I then checked the bandswitch and every connection in the output tank and everything is 
working exactly correctly.

I then tried a different set of new finals, and got the same result.

Anyone here have a clue as to what is going on?

Even with the amp acting this way, I can easily achieve at least 600 watts output with 
around 50 watts of drive, and I am happy with that, but this still does not seem right to me.

Ken W7EKB
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From wa2lbi at gmail.com  Thu Dec  8 19:52:16 2016
From: wa2lbi at gmail.com (Ken Winterling)
Date: Fri, 09 Dec 2016 00:52:16 +0000
Subject: [Heath] SB-200 loading question.
In-Reply-To: <5849FA54.8259.6D2B37F9@kgordon2006.frontier.com>
References: <5849FA54.8259.6D2B37F9@kgordon2006.frontier.com>
Message-ID: <CALK4bwi2MeApMB7oE1CwWVB=_643sZBnZ+NX73T7ML-q1CxODg@mail.gmail.com>

Ken,

How does it respond on a 50 ohm dummy load?  It is best to perform all
testing on a dummy load so as to eliminate the antenna and associated
cable(s) as a variable.

Ken
WA2LBI

On Thu, Dec 8, 2016 at 19:37 Kenneth G. Gordon <kgordon2006 at frontier.com>
wrote:

>
> I am somewhat confused here and I hope someone can help:
>
>
> I am refurbishing an SB-200 for a friend.
>
>
> In this amp, C-27, the fixed 500 pfd 2 KV mica capacitor which is switched
> in parallel with
>
> the loading capacitor C-28A/B on 80 meters where additional loading
> capacitance is
>
> needed, especially on the low end of the band, had been replaced with a
> 525 pfd "door
>
> knob" capacitor capable of at least 5 KV. This "door knob" is a large one
> and I think it is
>
> actually either a 10KV or 25KV job.
>
>
> It checks out with my cap meter perfectly.
>
>
> While using this amp, with new finals, on the low end of 80 meters, I "run
> out" of loading
>
> capacitor before achieving full load. I.e., the loading capacitor is up
> against the full-capacitance stop.
>
>
> The antenna is being fed through a home-brew antenna coupler, and the SWR
> between the
>
> amplifier and the coupler is 1:1.
>
>
> I then paralleled that "door-knob" capacitor with a 500 pfd 2KV mica, and
> STILL run out of
>
> loading capacitance on the low end of 80 meters.
>
>
> The amp works perfectly and properly on all other bands and frequencies.
>
>
> I then checked the bandswitch and every connection in the output tank and
> everything is
>
> working exactly correctly.
>
>
> I then tried a different set of new finals, and got the same result.
>
>
> Anyone here have a clue as to what is going on?
>
>
> Even with the amp acting this way, I can easily achieve at least 600 watts
> output with
>
> around 50 watts of drive, and I am happy with that, but this still does
> not seem right to me.
>
>
>
> Ken W7EKB
>
>
> --

Ken
WA2LBI

Sent from one of my mobile devices
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From kgordon2006 at frontier.com  Sat Dec 10 13:04:16 2016
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Sat, 10 Dec 2016 10:04:16 -0800
Subject: [Heath] SB-200 loading question.
In-Reply-To: <20161210.022722.11354.0@webmail12.vgs.untd.com>
References: <20161210.022722.11354.0@webmail12.vgs.untd.com>
Message-ID: <584C43A0.11443.400557@kgordon2006.frontier.com>

On 10 Dec 2016 at 7:27, kevin_ward at juno.com wrote:

> You say you "run out of loading capacitor before achieving full load", and "the loading capacitor 
> is up against the full-capacitance stop."? I believe increased loading is achieved by reducing the 
> loading capacitance of the tank circuit, not increasing it.

You are absolutely correct. I was thinking "backwards". Gee....

Sigh....sometimes I think I am too old...I forget simple things....

>? This would require readjusting the plate 
> tuning (to dip the plate current).? The point to stop this process is when the output power no 
> longer increases.? You are watching the output power, aren't you?? You didn't say what the grid 
> current was. ?

I keep the grid current to as low as I can keep it, consistent with proper output: about 600 
watts for a new set of RF Parts 572Bs. Normally, the grid current is about 35 mA per tube.

I believe that GRID current is the single most important parameter one must watch for GG 
amps....which is the reason I find the Yaesu FL-2100 so interesting: there is no way to 
measure grid current in that amp.

 > I believe Ken's (WA2LBI) suggestion about the dummy load is on the money, BTW. ?

Agreed.

> Most amplifiers work most efficiently at their lowest operating frequency.? Full output is then 
> achieved with the lowest amount of plate current.? If you are getting a full 600 watts output, but 
> the plate current is less than expected, be happy.? Your amp will run cooler and the tubes will 
> last longer, as long as the grid current is not too high. ?

As I said above... :-)

> One other thing.? What are you using to check SWR, and where is it connected?? Is it between 
> the amp and the tuner, or between the exciter and amp?

Ha ha! Amp and tuner, of course.

>? I am assuming it is after the amp 
> because most Heathkit amps have nothing like a 1:1 SWR at their input.

Correct. Unless they have been modified correctly. Mine has been. Input SWR is normally 
1.5:1 or less in those portions of the band in which I normally operate.

>? The point here is that if 
> the input tuned circuit favors the high end of the band, that can prevent the amp from achieving 
> full loading at the low end. ?

Yes.

> Do keep the list informed.? We will all be interested to know how you make out. ?

Well, Kevin, as you so astutely pointed out, loading increases with REDUCTION in loading 
capacitor capacitance.

I was thinking backwards.

What I do on 80 meters is adjust for maximum power output, yet not exceeding 600 watts 
and setting for lowest possible grid current while achieveing that output.

I then check plate current, and it is always below 500 mA on 80 meters.

I am happy now.

FYI, I also doubled the inductance of the filament chokes.

Thanks for the advice and reminders, folks.

Ken W7EKB

---
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https://www.avast.com/antivirus


From kgordon2006 at frontier.com  Sat Dec 10 16:28:18 2016
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Sat, 10 Dec 2016 13:28:18 -0800
Subject: [Heath] SB-200 loading question.
In-Reply-To: <1958605.43957.1481304625044.JavaMail.defaultUser@defaultHost>
References: <5849FA54.8259.6D2B37F9@kgordon2006.frontier.com>,
 <1958605.43957.1481304625044.JavaMail.defaultUser@defaultHost>
Message-ID: <584C7372.32039.FAD0EC@kgordon2006.frontier.com>

On 9 Dec 2016 at 17:30, BOB RALPH wrote:

> 
> Not enough inductance then so?shorted turns? ??
> Bob G4KSG

Sigh....no, as Kevin mentioned, I was thinking "backwards".

I had forgotten that LESS capacitance at the loading control equals MORE output to the 
antenna.

There is nothing wrong with the amp: it is simply operator error.

I watch grid current very closely and keep it less than 50 mA per tube. Usually I try to keep it 
about 35 mA per tube, in fact. 

I have always regarded grid current as the most critical parameter one should track in GG 
amps. That is one reason I have always thought the FL-2100 was weird: there is no way to 
monitor grid current with that amp in its stock configuration.

I have also modified the input circuitry to my SB-200 so that it shows no more than 1.5:1 
over those portions that I use in all ham bands.

Power output on 80 meters with new RF Parts 572Bs is 600 watts with about 50 watts of 
drive power. Plate current is less than 500 mA. All this makes me happy, and the amp 
seems to be happy too.

My thanks to Kevin for waking me up.

Ken W7EKB

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From kgordon2006 at frontier.com  Sat Dec 10 19:04:21 2016
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Sat, 10 Dec 2016 16:04:21 -0800
Subject: [Heath] SB-200 loading question.
In-Reply-To: <1699244174.539120.1481413874643@mail.yahoo.com>
References: <5849FA54.8259.6D2B37F9@kgordon2006.frontier.com>,
 <584C7372.32039.FAD0EC@kgordon2006.frontier.com>,
 <1699244174.539120.1481413874643@mail.yahoo.com>
Message-ID: <584C9805.27179.189ACF1@kgordon2006.frontier.com>

On 10 Dec 2016 at 23:51, Glen Zook wrote:

> 
> With my SB-200, I have found that increasing the loading slightly after achieving 
> maximum output results in only a very small percentage of power reduction but 
> reduces the grid current substantially. ?Depending on the band, I can get 
> 600-watts out with less than 25 mA total grid current.

Kewel!

I'll do that here.

Thanks, Glen

Ken W7EKB

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From gzook at yahoo.com  Sat Dec 10 18:51:14 2016
From: gzook at yahoo.com (Glen Zook)
Date: Sat, 10 Dec 2016 23:51:14 +0000 (UTC)
Subject: [Heath] SB-200 loading question.
In-Reply-To: <584C7372.32039.FAD0EC@kgordon2006.frontier.com>
References: <5849FA54.8259.6D2B37F9@kgordon2006.frontier.com>
 <1958605.43957.1481304625044.JavaMail.defaultUser@defaultHost>
 <584C7372.32039.FAD0EC@kgordon2006.frontier.com>
Message-ID: <1699244174.539120.1481413874643@mail.yahoo.com>

With my SB-200, I have found that increasing the loading slightly after achieving maximum output results in only a very small percentage of power reduction but reduces the grid current substantially. ?Depending on the band, I can get 600-watts out with less than 25 mA total grid current.
?Glen, K9STH?
Website: http://k9sth.net

      From: Kenneth G. Gordon <kgordon2006 at frontier.com>

Sigh....no, as Kevin mentioned, I was thinking "backwards".

I had forgotten that LESS capacitance at the loading control equals MORE output to the 
antenna.

There is nothing wrong with the amp: it is simply operator error.

I watch grid current very closely and keep it less than 50 mA per tube. Usually I try to keep it 
about 35 mA per tube, in fact. 

I have always regarded grid current as the most critical parameter one should track in GG 
amps. That is one reason I have always thought the FL-2100 was weird: there is no way to 
monitor grid current with that amp in its stock configuration.

I have also modified the input circuitry to my SB-200 so that it shows no more than 1.5:1 
over those portions that I use in all ham bands.

Power output on 80 meters with new RF Parts 572Bs is 600 watts with about 50 watts of 
drive power. Plate current is less than 500 mA. All this makes me happy, and the amp 
seems to be happy too.

My thanks to Kevin for waking me up.

Ken W7EKB

---
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_______________________________________________
Heath mailing list
Heath at puck.nether.net
https://puck.nether.net/mailman/listinfo/heath

   
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From kgordon2006 at frontier.com  Sun Dec 11 13:05:24 2016
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Sun, 11 Dec 2016 10:05:24 -0800
Subject: [Heath] SB-200 - another issue
Message-ID: <584D9564.1606.128A27@kgordon2006.frontier.com>

So, in checking filament voltage under load, I find that mine is 6.67 VAC, which is a bit high. 
572B is rated at 6.3VAC +/-0.5 V. Eimac notes that reduction of filament voltage contributes 
to additional life for the tubes.

So, I'll be reducing that to around 6.15 VAC or so.

Secondly, the lamp which is mounted in a hole in the back of the meter has melted and 
distorted the meter's case. So I replaced that lamp with 3 ea 10 mm white LEDs and a small 
power supply from 1/2 the filament supply.

Looks nice, although the light is awfully white. I'd prefer a slight yellow cast to it, but this is 
OK.

After I have reduced the filament voltage and repaired one knob, I'll install a set of new 
tubes, reassemble the amp, and loan it to one of our locals for a while.

Ken W7EKB

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From gzook at yahoo.com  Sun Dec 11 10:35:11 2016
From: gzook at yahoo.com (Glen Zook)
Date: Sun, 11 Dec 2016 15:35:11 +0000 (UTC)
Subject: [Heath] SB-200 loading question.
In-Reply-To: <wgib8vc88loiw3u9yvt272xd.1481427959511@email.android.com>
References: <wgib8vc88loiw3u9yvt272xd.1481427959511@email.android.com>
Message-ID: <1100796117.727691.1481470511339@mail.yahoo.com>

I believe that is true.
?Glen, K9STH?
Website: http://k9sth.net

      From: George Collins <gjcollins at cox.net>
 To: Glen Zook <gzook at yahoo.com> 
Cc: Heath at puck.nether.net
 Sent: Saturday, December 10, 2016 9:45 PM
 Subject: Re: [Heath] SB-200 loading question.
   
Glen,

Doesn't increasing the loading, as you describe, also improve the amplifier's IMD characteristics?

   
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From gjcollins at cox.net  Sat Dec 10 22:45:59 2016
From: gjcollins at cox.net (George Collins)
Date: Sat, 10 Dec 2016 22:45:59 -0500
Subject: [Heath] SB-200 loading question.
Message-ID: <wgib8vc88loiw3u9yvt272xd.1481427959511@email.android.com>

Glen,

Doesn't increasing the loading, as you describe, also improve the amplifier's IMD characteristics?

George, KC1V

 Glen Zook via Heath <heath at puck.nether.net> wrote:

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>Heath at puck.nether.net
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From kgordon2006 at frontier.com  Mon Dec 12 13:39:14 2016
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Mon, 12 Dec 2016 10:39:14 -0800
Subject: [Heath] SB-200 loading question.
In-Reply-To: <8902107.35004.1481552008531.JavaMail.defaultUser@defaultHost>
References: <5849FA54.8259.6D2B37F9@kgordon2006.frontier.com>,
 <584C7372.32039.FAD0EC@kgordon2006.frontier.com>,
 <8902107.35004.1481552008531.JavaMail.defaultUser@defaultHost>
Message-ID: <584EEED2.3588.C944B8@kgordon2006.frontier.com>

On 12 Dec 2016 at 14:13, BOB RALPH wrote:

> Ken said - "That is one reason I have always thought the FL-2100 was
> weird: there is no way to monitor grid current with that amp in its
> stock configuration". 
> 
> Because Yaesu and others thought in that decade that tuning for max.
> oomph was near enough and of course it still is. It's just that some
> of us who are clever RF engineers just had to apply - 'The more you
> know the more you know you don't know' so I if we give you a grid
> current meter/switch position will you shut up and go away. 

Ha ha! Sure! :-)

Belt and braces.... ;-)

Ken W7EKB



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