From W6ph at aol.com  Tue Jan  1 09:10:38 2013
From: W6ph at aol.com (W6ph at aol.com)
Date: Tue, 1 Jan 2013 09:10:38 -0500 (EST)
Subject: [HBR] K4CHE HBR website?
Message-ID: <6baa.2d53fa2e.3e14485e@aol.com>

Does anyone know what has happened to the K4CHE.com website?  No  e-mail 
address on QRZ.com.  Breck had some great information on building an  HBR with 
awesome pictures.  Sadly, Chas Byers K3IWK who provided aluminum  chassis 
material became a Silent Key on Dec 25.  Breck used his materials  to build 
an HBR.  
 
                             Kurt W6PH

From w0ep at w0ep.us  Tue Jan  1 09:58:54 2013
From: w0ep at w0ep.us (Chris Howard w0ep)
Date: Tue, 01 Jan 2013 08:58:54 -0600
Subject: [HBR] K4CHE HBR website?
In-Reply-To: <6baa.2d53fa2e.3e14485e@aol.com>
References: <6baa.2d53fa2e.3e14485e@aol.com>
Message-ID: <50E2F9AE.50509@w0ep.us>


It works for me ok just now.

Maybe they had a server outage of some sort?

Chris
w0ep



On 1/1/2013 8:10 AM, W6ph at aol.com wrote:
> Does anyone know what has happened to the K4CHE.com website?  No  e-mail 
> address on QRZ.com.  Breck had some great information on building an  HBR with 
> awesome pictures.  Sadly, Chas Byers K3IWK who provided aluminum  chassis 
> material became a Silent Key on Dec 25.  Breck used his materials  to build 
> an HBR.  
>  
>                              Kurt W6PH
> ______________________________________________________________
> HBR mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> 
> 

From W6ph at aol.com  Tue Jan  1 12:23:42 2013
From: W6ph at aol.com (W6ph at aol.com)
Date: Tue, 1 Jan 2013 12:23:42 -0500 (EST)
Subject: [HBR] K4CHE.com
Message-ID: <142b2.7e5e633a.3e14759e@aol.com>

 
Guys,  
 
Sorry about that post.  It turns out to be a problem with my AOL and  IE.  
It doesn't like K4CHE.com without www in front.  Breck's website  is alive 
and well when I used a different browser.  If you are  contemplating an HBR 
build, this is a must for you.  k4che.com, click on  HBR14 on the right side. 
 Also the W6HHT CD. 
 
                                   Kurt W6PH
 
 
 
In a message dated 1/1/2013 12:00:33 P.M. Eastern Standard Time,  
hbr-request at mailman.qth.net writes:

It works  for me ok just now.

Maybe they had a server outage of some  sort?

Chris
w0ep





From DAVEINBHAM at aol.com  Tue Jan  1 16:42:40 2013
From: DAVEINBHAM at aol.com (DAVEINBHAM at aol.com)
Date: Tue, 1 Jan 2013 16:42:40 -0500 (EST)
Subject: [HBR] K4CHE.com
Message-ID: <16b4d.135be071.3e14b250@aol.com>

Hi Chris
 
Please remove Dave from your list.  Dave died on Dec. 11, 2012.  Thank you. 
 The Holder family.

From w0ep at w0ep.us  Tue Jan  1 17:16:21 2013
From: w0ep at w0ep.us (Chris Howard w0ep)
Date: Tue, 01 Jan 2013 16:16:21 -0600
Subject: [HBR] K4CHE.com
In-Reply-To: <16b4d.135be071.3e14b250@aol.com>
References: <16b4d.135be071.3e14b250@aol.com>
Message-ID: <50E36035.9000000@w0ep.us>

Dear Holder Family,

I am very sorry to hear about Dave.

Unfortunately, I am not the owner of the list, just a user.
I think you can follow the links at the bottom of this message to
discover who runs the thing and how to get Dave's email address removed.

If you have any trouble with that I would be happy to help in
any way I can and I'm sure the rest of the list participants
feel the same way.

Chris Howard
W0EP
Columbus, Mississippi







On 1/1/2013 3:42 PM, DAVEINBHAM at aol.com wrote:
> Hi Chris
>  
> Please remove Dave from your list.  Dave died on Dec. 11, 2012.  Thank you. 
>  The Holder family.
> ______________________________________________________________
> HBR mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> 
> 

From ianmwilson73 at gmail.com  Sun Jan  6 07:04:03 2013
From: ianmwilson73 at gmail.com (Ian Wilson)
Date: Sun, 6 Jan 2013 04:04:03 -0800
Subject: [HBR] Output stage is power oscillator
Message-ID: <CAEz8jcSJOzyK-P6igkf28jKMXn85Ko48sB_bCqFE69805X90pg@mail.gmail.com>

I have been using a single pentode output stage. No problems, except
that the output is rather low and I think it could benefit from some
negative feedback to reduce distortion.

So I added a triode using the circuit from the HBR-13, although I am
temporarily using a 6AW8A until I can get the right box out of the garage
to locate a 6CX8.

This output stage oscillates very enthusiastically. I thought it was a
problem with input shielding but with all input wiring removed it still
oscillates around 50kHz. This comes down to audio ranges if I add
a 0.01uf capacitor across the power transformer primary.

I have added stopper resistors; no help (thought perhaps it was
oscillating at VHF and squegging at 50kHz).

Suggestions?

73, ian K3IMW

From imalowfer at yahoo.com  Sun Jan  6 12:34:41 2013
From: imalowfer at yahoo.com (Ron Barlow)
Date: Sun, 6 Jan 2013 09:34:41 -0800 (PST)
Subject: [HBR] Output stage is power oscillator
In-Reply-To: <CAEz8jcSJOzyK-P6igkf28jKMXn85Ko48sB_bCqFE69805X90pg@mail.gmail.com>
References: <CAEz8jcSJOzyK-P6igkf28jKMXn85Ko48sB_bCqFE69805X90pg@mail.gmail.com>
Message-ID: <1357493681.45570.YahooMailNeo@web160805.mail.bf1.yahoo.com>

Hi Ian
Without seeing a schematic and photo, my guess would be that more B+ circuit decoupling is in order. If you have a spare power supply, you could test this theory by using the spare power supply for the B+ source for only the triode stage.?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ?73 & GL ?de Ron ?n4gjv
??


________________________________
 From: Ian Wilson <ianmwilson73 at gmail.com>
To: HBR Receiver List <hbr at mailman.qth.net> 
Sent: Sunday, January 6, 2013 7:04 AM
Subject: [HBR] Output stage is power oscillator
 
I have been using a single pentode output stage. No problems, except
that the output is rather low and I think it could benefit from some
negative feedback to reduce distortion.

So I added a triode using the circuit from the HBR-13, although I am
temporarily using a 6AW8A until I can get the right box out of the garage
to locate a 6CX8.

This output stage oscillates very enthusiastically. I thought it was a
problem with input shielding but with all input wiring removed it still
oscillates around 50kHz. This comes down to audio ranges if I add
a 0.01uf capacitor across the power transformer primary.

I have added stopper resistors; no help (thought perhaps it was
oscillating at VHF and squegging at 50kHz).

Suggestions?

73, ian K3IMW
______________________________________________________________
HBR mailing list
Home: http://mailman.qth.net/mailman/listinfo/hbr
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:HBR at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

From ianmwilson73 at gmail.com  Sun Jan  6 21:50:13 2013
From: ianmwilson73 at gmail.com (Ian Wilson)
Date: Sun, 6 Jan 2013 18:50:13 -0800
Subject: [HBR] Output stage is power oscillator
In-Reply-To: <1357493681.45570.YahooMailNeo@web160805.mail.bf1.yahoo.com>
References: <CAEz8jcSJOzyK-P6igkf28jKMXn85Ko48sB_bCqFE69805X90pg@mail.gmail.com>
	<1357493681.45570.YahooMailNeo@web160805.mail.bf1.yahoo.com>
Message-ID: <CAEz8jcROZfSsrbPeBfRiyZd51=iqkqin-czxaOfAH9XiA7KaFg@mail.gmail.com>

The problem turned out to be that even with the input stage "disconnected"
it can see enough of the output to be able to have greater than unity gain
around the loop.

I had a small ceramic capacitor connected to the triode grid, not connected
to anything but sticking up 1/2" (at most) above the chassis. That turns out
to be enough. Connecting a length of screened lead to the grid instead
(with the remote end connected to the volume control) and the problem
went away.

As a side effect of trying to get rid of this I now have better bypassing
around the product detector stage :)

Once things were working, I made the trip to the garage so I am now
running the correct triode-pentode (6CX8 instead of 6AW8A). There
is a little more volume and it sounds a little more balanced. I will stop
here before getting into "transparent highs", etc.

73, ian K3IMW

