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

Fri, 15 Mar 2002 09:24:25 -0500

I was going to suggest a radiused dial
but more of a slot. Either cut in the front panel or in a
smaller panel that stands off from the front and has your
reduction drive mounted. A fairly thin slit and put your
scale on a card that you drop between the two panels
when you swap coils.

Say, a 3/8 wide slot on 3" radius. You could backlight as well.

Now if you want string, one can do a lot with string :-)

-bob

Sandy and Kees Talen wrote:

> 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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>>
>>
> 
> 
> 
> 
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> 
> 
> 
> ************************************
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> construction notes...... via http://www.qsl.net/k5bcq/ 
> 
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