[Hammarlund] HQ-170A drift

[Kenneth G. Gordon]

On 17 May 2014 at 18:02, Bill Stewart wrote:

> I saw that someone recommended using a military 
> version of the 6C4...what would that be?

There were three, each a little better than the previous one: 6C4WA, 6100, 
and the best, 6135. 

I found a number of 6135s NIB on eBay for very cheap. They were in original 
military boxes. One cut the drift of my HQ-110 to zero.

And, 6C4WA equivalents are: EC90, CV4058, M8080, 6100, 6135.

I used 6135.

> Also, does
> anyone have a 'favorite' brand of 6C4 that helped
> reduce your drift?

As I remember it, the Sylvania brand were the best ones.

Carl?

Ken W7EKB