[Elecraft] PSK Microphone input

[G3VVT at aol.com]

In a message dated 28/10/05 12:35:50 GMT Daylight Time, acatan at wi.rr.com  
writes:

The K2  is capable of quite high quality transmit
audio, but it isn't as apparent  with the electret microphones. Icom et
al have made the break with  electrets starting with their Pro II and  later
rigs.


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The selection of a microphone type may take a little more care as it  depends 
a lot on the tonal range of your voice to which type is suitable and  more 
particularly so in the case of SSB. One type may be OK for one person yet  may 
be useless for another.
 
I struggled for many years to find a suitable microphone for SSB where  there 
was no problem with 2m FM. Ended up with a varied selection of dynamic  
microphones from Shure, Kenwood, Yaesu and many other manufacturers. The type  that 
finally worked was the old Adonis AM-303G electret microphone. However,  when 
I tried to use the same type of electret microphone on 2m FM was firmly  told 
what to do with it.
 
Have yet to try the Heil dynamic microphones to see what the effect is with  
them. Have an old Heil desk microphone (HM-5?) which came from an S/K sale 
that  had been modified to high impedance use. Will change it back to original  
configuration and see how that works out. The insert in this is the HC-3  which 
have been unable to find any info about. Did approach Bob Heil for  details 
about the microphone and though he gave favourable comments  for the microphone 
itself, was not forthcoming with any information or data  about the HC-3 
insert.
 
Does anybody have any information about this Heil HC-3  insert?
 
Bob, G3VVT