[Boatanchors] Ranger 80 Meter Drive

[joe at tronixland.com]

Harry, ...Since your Ranger works fine with a crystal, I'm thinking you may 
have trouble with VFO low output voltage. I believe there is a 18K  resistor 
in the VFO compartment that can cause this problem. Check pin 6 on the 6AU6 
oscillator tube for +150 VDC.
Good luck and 73,
Joe
KF9EU
----- Original Message ----- 
From: "Harry Vaught, KT4AE" <kt4ae at bellsouth.net>
To: <boatanchors at mailman.qth.net>
Sent: Monday, November 05, 2007 2:41 PM
Subject: [Boatanchors] Ranger 80 Meter Drive


> I've tried this on the Johnson list and only got one message of sympathy 
> and support.  Maybe the one person who knows the answer is here.
>
> I have a Ranger which works fine on all bands and frequencies, 160-10, 
> except the upper part of 80 meters, i.e. 3885.  At, say, 3550, it's fine.
>
> In "Tune" mode, there's plenty of grid drive, but when the transmitter is 
> fully dipped and loaded the grid drive drops to about 1.25 ma.  When 
> speaking into a microphone the trace on the SB-610 looks like it's being 
> clipped by a limiter or hit saturation at maybe 60% - flat tops and 
> bottoms.  A small amount of additional grid drive can be had by retuning 
> the "Buffer" control.  The "Drive" control has very little effect under 
> these conditions.
>
> All available meter indications are similar to those on other bands, even 
> on 160 at 1/2 3885.  It works fine with a 3885 crystal.
>
> Years ago, I couldn't get much grid drive on 80 in "Tune", but I was 
> advised to replace R8, in the Buffer screen circuit and that problem was 
> cured.  Now, it's only with the transmitter fully dipped, loaded, and 
> keyed that the drive drops.
>
> Any ideas?
>
> Harry, KT4AE
> Maryville, Tennessee
>
>
>
>
>
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