Adam, In a bare bones emergency situation to which extend the D4D works with a high capacity 5V pack as it's sole power supply? (assume connectors worked out properly). ¿Does the D4D work with less pe

I also have just finished the kit did a set up with dummy load and put it on the air. Receiving signals from all over have only made a few contacts with it but Antenna is located in the attic and had

My CRKits D4D-20m is up and running! I’m using my G5RV antenna 150ft from my house and getting spots in NH (Northeast USA) all the way out to Texas and California - pretty good on what must be 10s of

Folks, The first time to join Japan Ham Fair. Really enjoyed it. I hope you can share my fun by reading these two posts. https://mp.weixin.qq.com/s/jKD-XuBDnhEvp2saCvbUHA https://mp.weixin.qq.com/s/5Q

Folks, Lesson learned. This weekend I will update the web site to default EMS shipping with higher freight 20 USD. For the returning customers with good transaction experiences, you can save money by

Folks, The young lady speaks fluent English and she does know about ham radio. The video is recorded by my iPhone in Japan Ham Fair. Enjoy! http://mp.weixin.qq.com/s/vdZSLsstiFEqqEf7FdkQCA Thanks, Ada

Folks, I have added a few important items in this new revision. Such as: 1. In accessories section, I have added Mini Wire Antenna and other newly added accessories/options. 2. In modifications sectio

I just picked up several 4 cell holders for making a battery pack with 18650's, and a supply of used cells. But fully charged cells make for an initial voltage of 16.7 or so volts. Do I dare connect m

Folks, This is my work this weekend. https://mp.weixin.qq.com/s/ehBss8YBT0Y8z2WMg5oKpA Thanks, Adam

Hi I have recently built the D4D kit for the 40m band. The whole experience of building it was great. I have a small problem with the power output however. Even with 800mV at the input and with no mod

Hi! I finally assembled my kit in a couple of hours, and I'm very happy with it. Related to TX power, I read on the manual that needs to be set just at the minimum level that triggers the relay stably

Folks, It is a HT-1A! https://bbs7.sekkaku.net/bbs/upfile/qrp--1566139551-675-497-470-111.jpg You want to know how? Thanks, Adam

Folks, It is in Japanese, but you can figure out the major spec difference among our D4D and the other two radios. Thanks to the efforts from JL1KRA. https://bbs7.sekkaku.net/bbs/upfile/qrp--156605968

I am offering my unbuilt D4D kit for sale. It is the 20m version, and the price is $35 shipped. U.S. addresses and PayPal only, please. Jerry AA6KI Tucson

Folks, I've updated the web site to show the change of the shipping and service policy. Please view: http://crkits.com Thanks, Adam

Folks, A few of customers might have questions when you receive your HT-1A kit or assembled kit. Let me explain a few things: 1. User manual is not included. You will need to download from http://crki

my d4d is off frequency, low by 2khz . do i decrease or increase capitance. it's at 14.272. thanks, ron kc0tdj

Folks, You are invited to join the new group. https://www.facebook.com/groups/487925331780070/ Thanks, Adam

Hi all, I built the D4D kit a couple of days ago and it worked well. I didn't make any QSOs just yet, but the band conditions are not good so this isn't a problem. Yesterday, however, I powered up the

Folks, I have decided to join Japan Ham Fair 2019 this year. It will be a fast in fast out trip but I should be able to stay at QRP village booth for about 1 day from August 31 noon to September 1 noo