Comments for LB3HC's hightech blog

Comment on HF converter for SDR Funcube dongle by admin

admin — Sun, 17 Feb 2013 10:37:09 +0000

I dont use Twitter too much at the moment. Perhaps in the future.

Comment on HF converter for SDR Funcube dongle by orlando shuttle

orlando shuttle — Sat, 16 Feb 2013 15:58:59 +0000

Hey! Do you use Twitter? I’d like to follow you if that would be ok. I’m definitely enjoying your blog and look forward to
new updates.

Comment on Arduino Based CW keyer / FTDI based CAT interface by admin

admin — Sat, 20 Oct 2012 17:03:39 +0000

Here you can grab the version I am using: http://www.lb3hc.net/wp-content/uploads/2012/10/K3NG_Arduino_Keyer_2012090501_LB3HC_edited.zip (Credit to K3NG)

Comment on High potential testing of an YC-179 high power vacuum tube by admin

admin — Sat, 20 Oct 2012 16:57:31 +0000

Hello Joun. You are welcome to send me some pics. Do you info about the source where these came from? I may be interested. However, if the condition is unknown and they have been unused for some time the status of the vacuum and internal elements may be unknown the value is probably not that high.

Comment on Arduino Based CW keyer / FTDI based CAT interface by admin

admin — Sat, 20 Oct 2012 16:54:56 +0000

Hi David. I use the K3NG code with settings that work OK so far. My keyer has only one button and therefore I need only one resistor. I had the reset issue on the arduno but it can be solved by removing auto software reset (ASR). I am also working on a much smaller keyer that uses a mini version of Arduino. I will post the code I use. The credit for it must go to K3NG.

Comment on Arduino Based CW keyer / FTDI based CAT interface by David

David — Sat, 20 Oct 2012 15:49:48 +0000

Hello,

Is it possible to send me a copy of the arduino code you used here? the k3ng version is much more complicated at this moment with to much options I will not use….

regards,
David, on3dga

Comment on Approx 31000 QSOs made in 24h during the Azores Island Hunt by DUARTE PEREIRA

DUARTE PEREIRA — Mon, 15 Oct 2012 17:28:36 +0000

I just LOVED to have 9 QSOs with my birth Place ! Many tks for the opportunity !!!

Duarte , KA1HFL & CU2JR

Comment on High potential testing of an YC-179 high power vacuum tube by John

John — Fri, 28 Sep 2012 15:55:57 +0000

Hi all,

I just acquired two of these YC-179 tubes. I have pictures if you would like to see them. I have no need for them as I bought them in a large lot of tubes. Let me know if any of you have any interest in them.

Comment on High potential testing of an YC-179 high power vacuum tube by admin

admin — Fri, 10 Aug 2012 11:48:53 +0000

Hi Mike. Unfortunetely this tube is not for sale. I am in fact looking for one more of these to have one spare for this future project …

Comment on High potential testing of an YC-179 high power vacuum tube by admin

admin — Fri, 10 Aug 2012 11:48:14 +0000

Hello Peter. Thank you for your comment. In the limited initial testing with my HiPot unit I have done so far, I do it basically after the same principle as is described in the Eimac engineering bulletin. The main principle of the Eimac engineering bulletin, if I understand it correctly, is to be certain that you control where the breakdown is measured by connecting different electrodes of the tubes together. Eg, if you want to measure from anode to grid, you connect grid and filament together even if the grid is closer to the anode than the filament. The engineering bulletin mentions screen(s), which is/are not applicable for triodes. Also the bulletin is specifically written for larger transmitting tubes. The debarnacling should not be necessary on an YC-179 initially since there is a gettering material in this tube that will likely take care of degassing at least. After degassing debarnacling may of course be done. I have specifically checked that there is a gettering material in the YC-179 with a senior Eimac engineer even if several sources on line says that there is no gettering material present in this tube…