HW-101 Tubes

[Adam McLaughlin]

I have found the identical problem when a Tung-Sol tube for V15.

I guess not all tubes are created equal!

Adam

>I want to pass on my experience with the El Menko tubes in the HW-101,
>SB-100 series rigs.  Heath 20+ years ago started getting a brand called El
>Menko.  Hopefully your rig does not have them.  The 6AU6 had 5 volt
>filaments so the VFO would drift excessively, also the 6AU6 used in the S
>meter circuitry would pin the needle.   I recently ran into problems with
>my sidetone oscillator being RF sensitive. Each time you held the key down
>the rig would transmit for .5 seconds or so and then the VOX would cut off.
> In addition the sidetone was terrible.  Thought it was a bypassing problem
>till I changed the 6EA8 at V15,  I still had the original 6EA8 made by El
>Menko in the rig.  Just for the heck of it I tried a old 6EA8 I had
>replaced with a 6CQ8 at V1.  This 6EA8  was also made by El Menko, but only
>in the rig a couple of years.  Needless to say it acted up also.  Finally I
>put in a Sylvania 6EA8 and the problem was solved.  I would advise all
>HW-101/SB-100 series users to check their tubes and replace any El Menko
>Brand.  I have completely retubed my HW-101 with tubes found at a Hamfest.
>
>
>By the way don't worry about the finals Heath did not use El Menko brand
>for the 6146s.
>
>73
>
>Steve Ray    K4JPN   ex K1VKW   HW-101, HW-8, SWL 30-40 and NC 38S Heath
>Kit fan
>
>
Adam McLaughlin KD6POC
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