[Elecraft] N1MM and Heil Pro Set+

[G4MKP]

I noticed a couple of posts re N1MM and erratic cw performance and low audio
with Heil Pro Set + headphones. 

 

Re the N1MM; I suffered a similar problem during IARU least weekend - K3,
Linear at ~ 400W, dipole partly above my shack at ~ 30 feet. Symptoms were
mainly long dashes. Also, whilst keying I could hear clicks in my Heil
headphones. I immediately wrapped the headphone lead around a ferrite ring
close to the ear piece and the clicks disappeared but the erratic cw
continued. Another ferrite ring on the headphone lead close to the K3
socket. Problem disappeared. With only 12 inches or so between my linear and
the K3 I guess it we can put that down to EMC. I also use double ferrite
beads and clip-ons on the parallel port keying circuit leads. 

 

Re the audio level of the Pro set + I have no problems at all. Volume
control at about 10 o'clock does me fine and my ears are just past the half
century mark with over 20 of those in the Army having fired off 10,000's of
rounds of ammo so am probably a little LF deaf.