[ARC5] Backwave

J Mcvey ac2eu at yahoo.com
Mon Oct 26 11:57:42 EDT 2015


The antenna select makes a fairly loud "clunk" when selected. The cathode select relay is quiet compared to that.
When keying the system as it was originally designed , the osc, screen, and plate B+ are "hot keyed" simultaneously  via the modulator keying relay.the antenna switch relay is also heard at the same time. I can definitely hear them, but they are not objectionably loud. I get chirp, but no backwave. The chirp appears to be function of loading/current and the power supply stability. 


     On Monday, October 26, 2015 10:51 AM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
   

 Heh! Speaking of "backwave", the Navy VLF station at Lualualei Hawaii (I 
can't remember the call right now) had a backwave that was not much more 
than 10 dB less than the main signal.

The reason, as I understand it, was that it was still using one of those big 
alternators for the transmitter.

I don't recall anyone complaining about it though...

Ken W7EKB
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