[HBR] Looking for some ideas on a slide rune dial....

Fri, 15 Mar 2002 20:05:13 -0500

Hello
Didn't QST, HR or 73 have an article on homebrewing a slide rule dial?
I just remember it vaguely.
Bob Mattson...W2AMI   WN2AMI 1962

----- Original Message ----- 
From: "Sandy and Kees Talen" <[email protected]>
To: <[email protected]>
Sent: Thursday, March 14, 2002 11:16 PM
Subject: Fw: Re: [HBR] Looking for some ideas on a slide rune dial....

> The Eddystone 598 is a nice 180 degree arc dial, I have one on a 
> HBR-11. It's much smaller than the National ACN/ICN dials and 
> about the same size as a National SCN. Best part; it has a smooth, 
> 10:1 tuning rate, Jackson Bros ball vernier drive. This has a "better" 
> feel than the "standard", 6.5:1 tuning rate, Jackson Bros ball vernier 
> drive. The size of the dial is compatible with the HBR-11/12 size 
> receivers where the Eddystone 898 or the ACN/ICN dials would be 
> too large. 
> 
> As an aside....I wouldn't be surprised if the 598 dials are actually 
> more difficult to locate than the 898 Eddystones because the 898
> was THE dial if you could afford it. National dials were OK-good,
> inexpensive, and readily available. 
> 
> A slower tuning ratio is desirable when using the "standard" 
> Jackson Bros drives and that's why two stacked ball verniers 
> with, a 42:1 tuning rate (21 turns stop to stop), are better yet, 
> but they must be mounted solidly.
> 
> The drawback of all 180 degree arc dials (in my opinion) is that
> there is limited space to indicate frequencies on the inner arcs.
> A "sliderule" dial circumvents this problem. 
> 
> "Human factors" and "ease of use" are very important in receivers ....
> ....that's what you are looking at and tuning for hours on end. Digital
> dials are really easy to use but "don't look right" on tube type 
> receivers (my opinion).     
> 
> Got off on a tangent ...what was your question ? 
> 
> 
> 73s  Kees K5BCQ  
>    
> 
> --------- Forwarded message ----------
> From: "Byron Tatum" <[email protected]>
> To: <[email protected]>
> Date: Thu, 14 Mar 2002 21:04:20 -0600
> Subject: Re: [HBR] Looking for some ideas on a slide rune dial....
> Message-ID: <001301c1cbce$1b2b2b40$28dedacf@tatum001>
> References: <[email protected]>
> 
> Hello Kees-
>     What do you think about the Eddystone 598? I have never used one
> before.
> ----- Original Message -----
> From: "Sandy and Kees Talen" <[email protected]>
> To: <[email protected]>
> Sent: Thursday, March 14, 2002 7:38 PM
> Subject: [HBR] Looking for some ideas on a slide rune dial....
> 
> 
> > Open to ideas and suggestions.......
> >
> > Since the Eddystone 898 dials are expensive, difficult to locate,
> > and too large for the smaller HBR-11, it would be nice to come
> > up with an inexpensive, useable, and easy to build slide rule dial
> > adaptable to both an existing HBR-16 or HBR-11.
> >
> > The dual Jackson Bros verniers are excellent, so the knob to tuning
> > capacitor drive is solutioned at 36:1. The only hangup is capacitor
> > shaft to a slide rule indicator. Maybe using a dial cord driven off a
> > pulley on the capacitor shaft. I want something which can be
> > retrofitted onto the older HBRs without having to resort to the
> > elevated subchassis used for the 898 dial.  Also something which
> > could be scaled down to "look right" on a smaller HBR-11/12.
> >
> > 73s  Kees K5BCQ
> >
> >
> >
> > ************************************
> > Visit the HBR Receiver Web Site with over 100 pictures of receivers and
> > construction notes...... via http://www.qsl.net/k5bcq/
> >
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> > http://mailman.qth.net/mailman/listinfo/hbr
> >
> 
> 
> 
> 
> ************************************
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> construction notes...... via http://www.qsl.net/k5bcq/ 
> 
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> 
> 
> 
> 
> ************************************
> Visit the HBR Receiver Web Site with over 100 pictures of receivers and 
> construction notes...... via http://www.qsl.net/k5bcq/ 
> 
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> 