[Boatanchors] Boatanchors Digest, Vol 123, Issue 1

Tue Apr 1 18:59:26 EDT 2014

 Ian, I have a 606A and a while back, my band switch locked up. I took the old girl apart and one of the slugs in the rotor had backed out enough to get hung up on the casting. Screwed it back in and got it 'close enuf' with a counter and it's been OK.
I'll never understand the agony some guys will go through trying to get the calibration and tracking to match the dial...
Use a good counter on the output and 'forgettaboutit'....

ron
N4UE

-----Original Message-----
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To: boatanchors <boatanchors at mailman.qth.net>
Sent: Tue, Apr 1, 2014 3:29 pm
Subject: Boatanchors Digest, Vol 123, Issue 1

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Today's Topics:

   1. Seized shaft (Ian Wilson)
   2. Re: Capacitor Information? (Rob Atkinson)
   3. Re: Seized shaft (Richard Knoppow)

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Message: 1
Date: Mon, 31 Mar 2014 16:05:35 -0700
From: Ian Wilson <ianmwilson73 at gmail.com>
To: Boatanchors <boatanchors at mailman.qth.net>
Subject: [Boatanchors] Seized shaft
Message-ID:
	<CAEz8jcSoim3_KECC+rs+SpeoPXTG7b+2duZ=ErTZ88fN59CctA at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

I've been working on an HP-606B for the past few days. The bandchange
mechanism was very stiff when I got the instrument, but had become
somewhat easier.

However, today it has become very stiff. I broke the (rather small) knob
while attempting to operate the bandchange. Now the shaft seems to have
frozen in place: I can no longer turn it even with an adjustable wrench.

The tuning turret, etc, still moves OK. It appears to be the short shaft
that passes through a hole in the front panel that has seized.

It is not clear to me how this shaft is retained. The 'inside' end
passes into a housing about 1" deep and about 5/8" diameter.

Any help freeing this up would be most welcome. I just had most of the
rest of this great signal generator up and running (typical!).

73, ian K3IMW

------------------------------

Message: 2
Date: Mon, 31 Mar 2014 19:22:13 -0500
From: Rob Atkinson <ranchorobbo at gmail.com>
To: Boat Anchors List <boatanchors at mailman.qth.net>
Subject: Re: [Boatanchors] Capacitor Information?
Message-ID:
	<CALWD7Z4m1RPcGxyzmW2-KZKJ2C0e0GdS=p7QHcJHWWcBHmcE5g at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

There's nothing wrong with a fixed value air dielectric cap.  I prefer
them over fixed vacuum because they do not leak.  Fixed vac only
provides higher v. but if you don't need that fixed air cap is better
in dry condx.   surplus sales sells fixed air capacitors.   Oddly,
fixed vac. caps are more common and cheaper.  I use them when space is
available where a mica or doorknob might be used only because they can
be had for a low amount of money.   Most don't want them because they
don't know what to do with them (I guess).

Rob
K5UJ

------------------------------

Message: 3
Date: Mon, 31 Mar 2014 22:45:04 -0700
From: "Richard Knoppow" <1oldlens1 at ix.netcom.com>
To: "Ian Wilson" <ianmwilson73 at gmail.com>,	"Boatanchors"
	<boatanchors at mailman.qth.net>
Subject: Re: [Boatanchors] Seized shaft
Message-ID: <15ECCB5D1A6E4DED9F466BCB20A610AF at VALUED20606295>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
	reply-type=original

----- Original Message ----- 
From: "Ian Wilson" <ianmwilson73 at gmail.com>
To: "Boatanchors" <boatanchors at mailman.qth.net>
Sent: Monday, March 31, 2014 4:05 PM
Subject: [Boatanchors] Seized shaft

> I've been working on an HP-606B for the past few days. The 
> bandchange
> mechanism was very stiff when I got the instrument, but 
> had become
> somewhat easier.
>
> However, today it has become very stiff. I broke the 
> (rather small) knob
> while attempting to operate the bandchange. Now the shaft 
> seems to have
> frozen in place: I can no longer turn it even with an 
> adjustable wrench.
>
> The tuning turret, etc, still moves OK. It appears to be 
> the short shaft
> that passes through a hole in the front panel that has 
> seized.
>
> It is not clear to me how this shaft is retained. The 
> 'inside' end
> passes into a housing about 1" deep and about 5/8" 
> diameter.
>
> Any help freeing this up would be most welcome. I just had 
> most of the
> rest of this great signal generator up and running 
> (typical!).
>
> 73, ian K3IMW

     I have a 606A manual, which came from an on-line source 
that has a drawing of the bandswitch detent mechanism and 
good mechanical assembly drawings in the back. I suggest 
soaking the shaft in a good bolt remover (forgotten a common 
term here). Not WD-40 but one of the good ones. The stuff 
made by Kano has a very good reptation. Someone on the list 
will remember the names.  Let it work for a few days if 
necessary.  Its likely the shaft is galled and stuck in the 
journal.

--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com 

------------------------------

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End of Boatanchors Digest, Vol 123, Issue 1
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