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HW-16 Spurious Emissions on 15

May 22nd 2013, 14:37

WB5EMX

Joined: Mar 15th 2013, 21:23
Total Topics: 0
Total Posts: 0
I have the HW-16 that I bought when I was a teenager. Many years ago I got a little postcard from Fox Charlie Charlie letting me know I was putting out a harmonic when I was running the rig on 15 meters. The card is long gone, thus I have no idea of the nature of the emission. What is worse, however, is that the plastic twiddle stick for adjusting Heath Kit coils is also long gone.
I suspect that merely going through the adjustment in the manual would cure the problem. Is there an adjustment tool available to replace the Heath Kit device? Yes, I probably could make my way to a Spectrum Analyzer, but the harder part is coming across the required tool!! WB5EMX
May 22nd 2013, 22:18

WB5EMX

Joined: Mar 15th 2013, 21:23
Total Topics: 0
Total Posts: 0
Actually, if anybody has one of those HW-16 twiddle sticks and can measure the size across the flat with a caliper, that would be appreciated.
Nov 21st 2013, 01:29

jlinsenb

Joined: Nov 16th 2013, 16:59
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Total Posts: 0
I bought a used one off of eBay. Mine measures 0.100 inches across the flats.
Jun 26th 2014, 03:12

KE8DO

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Using a TVI low pass filter should also help.
73
Don KE8DO
Mar 6th, 16:14

WB5EMX

Joined: Mar 15th 2013, 21:23
Total Topics: 0
Total Posts: 0
Quote by jlinsenb
I bought a used one off of eBay. Mine measures 0.100 inches across the flats.


Thanks for the tip, especially the measurement. My Kenwood went down, and I want to get this HW-16 back up and on the air. The manual claims it runs 90 watts of CW. Now I am a QRP operator. Not too sure just what 90 watts of CW sounds like!!
WB5EMX
Mar 13th, 17:12

WB1GCM

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
The HW-16 has 90 Watts power INPUT. The RF output is around 40 to 50 Watts on 80 and 40 meters; about 30 0n 15 meters. If you are used to QRP, which is 5 W maximum, with 50 Watts, you will have a 10 dB increase of signal strength at the other end. That's a little under 2 S units.
Mar 15th, 19:49

WB5EMX

Joined: Mar 15th 2013, 21:23
Total Topics: 0
Total Posts: 0
To WB1GCM: Well, I cannot argue with your comments about the power levels. I consider 30 watts of RF on 15 to be Smokin'!, especially if it is CW, it is probably all you need, anyway. On QRP, I have heard signals that had very little tone, more like modulated noise due to the low power level of the signal. QRP is a brave, new world.

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