Wagging DX-35 Meter

[Garey Barrell]

Tony -

Normal operation for those meters.  Not much to do about it other than 
install a newer, better quality meter.  Some have limited success by 
adding a capacitor across the meter to damp it a little, but it's a 
trade-off between response time and "steadiness"!   Actually with a 
little practice you get to where you can dip the final close enough to 
keep from burning it up while you wait for the meter to settle down so 
you can "fine-tune" the dip.  The transmitter is fine key-down for quite 
a while as long as it's in resonance.  Then the key is to make only very 
small adjustments to keep it from kicking off again.

A better behaving meter was installed starting with the DX-40, that was 
one of the "improvements".

73, Garey - K4OAH
Atlanta

Drake C-Line Service Manual
<http://hr99.home.mindspring.com/R-4C_Servicez/> 



Richard A. (Tony) Stalls wrote:

> Hello All...
>
> I'm looking for either a replacement meter for my DX-35, or expertise 
> on how to remedy the needle wagging like a happy puppydog's tail.
>
> For example, when loading the final, dipping the plate from the pegged 
> position causes the meter needle to wildly bounce back and forth and 
> doesn't settle down fast enough to get a reading.  Getting a grid 
> current reading is impossible.
>
> It does appear to be a problem with the meter rather than the 
> transmitter as it does this "wagging thing" out of the circuit with a 
> low voltage applied via taking a resistance measurement with my VOM.
>
> The original DX-35 meter is a black metal bodied Shurite style (see 
> any 50's era ARRL handbook advertising pages), 0-3 ma, 500 ohms, with 
> 0-150 on the top scale and 0-6 on the bottom.  It may be stamped with 
> 484621, although the part number in the manual is 407-33.
>
> Thanks & 73,
> Tony
> K4KYO
>
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