QRP Club

QRP Station => Builder's Corner => Topic started by: PG4I on December 01, 2014, 20:47:13 UTC

Title: My new QRP rig
Post by: PG4I on December 01, 2014, 20:47:13 UTC
I tried out a new setup during the CQWW contest.

Bottom of the picture, right to left: 14 MHz VFO, R1 direct conversion receiver (design by Rick Campbell KK7B) and transmitter with 2N3553, 2 Watt out max. The modular approach is very inviting for making experiments, e.g. I plan to replace the VFO with a DDS design in the near future.

Title: Re: My new QRP rig
Post by: PG4I on December 16, 2014, 10:18:24 UTC
Just finished a QSO with the new setup. I have added a DDS (Alu case on the right). It is basically a little AD9850 board from ebay, controlled by an arduino UNO. The DDS has a RIT and LCD. On the back I have a PTT input from the keyer which controls the RX/TX shift...
Title: Re: My new QRP rig
Post by: GM0LVI on December 16, 2014, 20:08:54 UTC
Some neat engineering there Joop!
Title: Re: My new QRP rig
Post by: vu2nan on December 20, 2014, 05:32:52 UTC
Great show, Joop!

73,

Nandu.
Title: Re: My new QRP rig
Post by: PG4I on December 20, 2014, 13:19:40 UTC
Thanks guys! More to follow...  ;D