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I use that Lyle K0LR style thermistor crystal heater in my freq counter. It has maintained better than 1hz stability for over a year now. Mike WE0H Charlie , W5COV wrote:

NP0 caps become much more important when going cold... not such an issue for ham electronics which will likely never see temps below 0C Matt W8ESE sent from my VIC-20

I have to agree with Hans . NP0 caps are fine in some applications , but not all . I just changed a pair of them out in a filter and replaced them with some high quality "glass" capacitors , which

my experience is not all npo caps are created equal. I suspect many are mismarked as happens with nuts and bolts. Mono caps or cog as they are sometimes called exhibit better stability. My beacon is

Hi Steve et al Speak for your own part of England! Here in London, the sun has disappeared behind some thick clouds. Personally I think NPO caps might be useful sometimes, but generally are

Greetings from sunny England, Those of you who have built the beacon kits will have noticed that we do not use NP0 caps. In fact I cannot remember the last time I used them. Yet these beacons are

Another qrss site that may be of interest is Ralph's, W5JGV, online grabbers. Part 15 rules in the US permit unlicensed operation on 160 to 190 khz with 1 watt input to a 50 ft antenna. See

Hi Hans, Add me to your list for the receiver kit. Tell me when and how you would like payment and I will get it to you fast. Many thanks, Mike WE0H hanssummers2000 wrote:

Clayton thanks for the link to Genesis. Nice offerings of kits, parts, and xtals. Mono caps npo at very attractive price! 73 Paul k5wms

Hi Mike, Paul et al Certainly the frequency of the 5068.8 rocks can be pulled easily. One thing to bear in mind: This receiver is a very basic design utilising two SA602's. The strong signal

http://www.pongrance.com/gcrx-fixed.html Sorry in my excitement I forgot to include this. I have the Norcal dds , which I contemplated using in a multiband Bitx. Not much has been written about 30

MIke in the bfo circuit you could replace the trimmer cap with and inductor and move the bfo freq to the lower side of the "window" of the filter and rec upper side band ala Bitx20. the first mixer

I've seen this too. My thoughts were to use the 18.138MHz crystals from Genesis radio (http://www.genesisradio.com.au/order.html) for the LO, and an 8 MHz IF. Clayton VK1TKA

I don't know, using 5068.8kc rocks would end up with a 2.4kc center freq in the audio output. Hans, what do you think? Mike WE0H Paul D wrote:

http://www.pongrance.com/gcrx-fixed.html Scroll down a bit on the page to find the lower cost partial receiver kit. Mike WE0H hans wrote:

Hi Paul WHat is the link? 73 Hans G0UPL http://www.hanssummers.com

I found a link to n3zi's site where he has a gen coverage rx kit suitable for 30m beacon op with dds or xtal control. I will have to check microprocessor xtals for combo that will cover 10.140.

Hi Newt, Cool, glad the Grabber is of use. When your signal comes in here it is strong. I see it is gone right now but I'll watch as the night grows older...I will test and calibrate my Grabber daily

I cut off a bit of the 'gimmick' cap and adjusted the signal to ride between 140077 and 140082 according to the WE0H grabber. Thanks Mike - I did my adjustment this evening using your grabber as

Hans and group, Sorry about taking up so much bandwidth!! - I will lop off another bit of the trick cap this evening when I get home. I will target 5 Hz for my FSK CW. 72 (+30) Newt k0nwt