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Hi John,? I've been tied up trying to get the receiver module working but got around to setting up the OCXO this morning.? I haven't measured the current drawn solely by the OCXO, the u3s with OCXO

Has anyone tried IR reflective films or coatings on their enclosures? http://fujifilm-innovation.tumblr.com/post/132184613469/its-transparentbut-blocks-heat-fujifilms

Hi all, 1) If you transmit on 30m into a 20m Low Pass Filter, you may not have sufficient attenuation of the harmonics. You should check this with a spectrum analyzer. Yes I know that many

Hi John I don't know whether these would work or not. The easiest way to know is to try it. Probably the only way. You would need parallel, ot SPI. The QCX addresses the LCD in 4-bit parallel mode. I

I'm no expert, but I would suspect these displays draw a lot more current then the supplied display.? I notice the ad does not specify the current required to drive it. Lee, w0vt

Nice find John.? I'd like to replace the LCD with OLED too, so be sure to let the group know how it comes out! 73, Don AE5K

Hi Paul, I'm planning to multi-band my QCX for 20/30 meters as well (waiting for parts).? I asked about T1 a few weeks ago, though the discussion quickly jumped to protecting the finals.? The

Paul, I like your idea of using a switched voltage on a varicap diode in the bpf to select different bands. I have been planning a multi band qcx but have not got around to it yet but have some

A few more details.? It looks like displays of this type use a WS0010 chipset, which is described as mostly compatible with the 4 or 8 bit HD44780 chipset used on most LCD displays.? Adafruit sells

I'd like to use my QCX in below-freezing temperatures and, to that end, have been looking for an OLED replacement to the 16x2 LCD screen that comes with the kit.? I've found one on aliexpress (link

Hi all, I've tried to listen on 14.074 MHz and I was unable to hear anything. So as a first approach to solve a possible hardware issue, I checked the voltages on the critical points pointed out in

Adhesive backed copper tape sold by garden suppliers as a slug repellent is a good option.

Hans, I’ll be 3D printing mine, and one for you! What’s your favourite colour? :-). Somewhere I have a can of conductive paint. I’ll give it a try if screening is a problem. Steve

Sorry if this gets posted twice - it seemed to have disappeared the first try.? I wanted to respond regarding color not making much difference in temperature.? Being a retired NASA engineer I have a

Hi all (again) Here are some thoughts about a experiment I am thinking of trying and would like peoples thoughts I have done some measurements of my current 20m OCX All using a dummy load and external

As to the plastic vs metal... I'm a strong advocate for shielding.? It does two things keep bad stuff in and band stuff out. In the simplest form that is. In too many cases in the field and even home

Robert, Most cores are non-conductive.? However if you see damage to the enamel wire it does not rule out a turn to turn short. I see that most often with two hole cores as some tend to have hard

-- Al KD4EO

WRT? heat... There is no one best color in the unfiltered sun.? I've had commercial experience, so a grain of salt.? ?A Kiosk project that was to be in the sun (it was solar powered) painted all

On Thu, Sep 20, 2018 at 10:43 AM, Chris Smith wrote: Also outdoors, running portable, the reflective display uses only 6-10mW of power without the backlight turned on.? A great battery outcome. The