[Boatanchors] Fwd: Drake cable question

Garey Barrell k4oah at mindspring.com
Fri Jun 6 21:36:07 EDT 2014


Ron -

Don't feel too bad....  The earlier cages DID have to be removed.  The B-Line made the cover 
removable.  The TR-3 solved the problem by not having a top!

On your cable question.....  The reason was lowest capacity/ft since it shunts the PreMixer 
signal between units.  Drake used Belden 8421 shielded cable, which externally is just about the 
same as the rest of the audio grade cables.   Heath used RG-62, but it is difficult to solder, 
much bigger, requires MUCH bigger turn radii, etc., etc......  Paul, K0UYA on the DrakeRadio 
reflector bought a roll of 8421 some time ago, (since that is the only way it comes these days,) 
and has been selling it by the foot ever since!

Since you're coming back to the Drake fold, you might want to join us on DrakeRadio, a Yahoo 
group.   Over 1200 members, and a LOT of collective knowledge.

<http://groups.yahoo.com/group/DrakeRadio/>

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>

Ron Bussiere via Boatanchors wrote:
>   fyi, boy, am I dumb.....
>
>   
>
> Here's one I'm (almost) ashamed to admit.
> I have several Drake transceivers, including my beloved TR-6/RV-6. I've been in them many times for initial clean-up, tube checking etc.
> However, I never knew until yesterday, that you can access the 6JB6s without removing the whole RF Cage!
>
> HUH?
>
> I always removed the whole thing, always wondering what that 'disk' was on the top of the shield. Yep, it's a 'handle' to remove just the top cover. I'll be.......
> I have almost memorized the TR-4Cw, TR-6 Manuals, but I never read that sentence. Just goes to show you are never too old to learn.
>
> ha ha
>
> ron
> N4UE
>
>
>
> I finally found a 'rough' but complete T-4XB transmitter to go with my
> beloved R-4Bs.
> I have a lot of Drakes and the CDs, etc.
>
> Just wondering about the cables to connect the xmitter and rec. I know that
> RG-62 is 'recommended', and I actually may have some, In fact, I'm sure I
> do.
> However, just wondering why that 93 ohm cable was picked. Was it a matter of
> capacitance/foot, loss, resonance, what?
> That was a LONG time ago, and I have lots of the new low-loss RG-6, RG-59,
> RG-58. For such a small length, I'm wondering how much difference it makes
> on HF....
>
> Just an old timer trying to learn.........
>
> ron
> N4UE
>
>



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