It's a judgment call, Julian. I had not noticed any issues either even though I use a wide bandwidth filter to scan the CW bands: exactly the situation the mod was designed for.
The mod delays activation of the AGC by relatively strong signals within the first I.F. (roofing filter) passband that some noticed when using a wide filter and listening to a fairly weak signal. When a strong signal appears nearby, it might cause the AGC to act, reducing the gain wanted to hear the weaker signal. This will happen most often when using a wide first I.F. filter, then using the second I.F. selectivity to enhance a weak signal within the first I.F. bandpass. I prefer to use a narrower first I.F. (roofing) filter and keep the other signal out entirely. Still, in extreme situations, the second I.F. can be sharper than the narrowest roofing filter. That's one key reason why the K3 has a second I.F.! I simply haven't noticed it yet. If you do decide to do them mod, it's an fairly easy project. Don't try to save the SMDs you remove. Put on some safety glasses and cut right through the epoxy bodies with sharp diagonal cutters, then clean off the pads with your iron and some solder wick. Since the parts are *surface* mounted (no leads through holes) it is much easier to clean off the pads than it is with the typical leaded parts. Then you add the new parts with the leads laying on the solder pads and trim off the excess leads. Ron AC7AC -----Original Message----- With my limited skills I'm not going to risk carrying out this mod which even the thru hole version involves removing an SMD component. If it wasn't for this reflector I wouldn't even know anything was wrong, so why risk damaging a working radio? ----- Julian, G4ILO K3 s/n: 222 K2 s/n: 392 G4ILO's Shack: www.g4ilo.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
