I would like to share some inside views and also like to have some critics to comment on our new upcoming project SB-7 Transceiver which is a single band 40 meter transceiver in S.S.B. mode (LSB only).
This upcoming Transceiver project is an improved version of our previous TRx project - JOTA TRx. The changes and enhancements for this TRx. would be: AUDIO FILTER, AGC CONTROL,S-METER & Mike Gain adjustments.The MAX Power of this Transceiver is 15 Watts.We will be updating this page and blog quite often so please take time and keep checking in for updates.
A small preview of the schematics and components used have been shown below:
SINGLE BAND RX SCHEMATIC:
The front-end amp appears to be the classic broad-band amp (in most ARRL HBs) the author (DEV) introduced me to - many years ago....
ReplyDeleteHowever, we could perhaps reduce the Rx drain on the PSU (portable-operation in mind) by feeding the BPF to the DBM, and make the pre/post filter amps (2x BJTs) tuned - to make-up for the lost-gain (among others). Just my thoughts - as a critic.
On the positive side: Yes this is a great project for the VU beginner - without spending $$$ - and, without the hassles of winding tuned-coils. Keeping it plain and simple, and most importantly - repeatability.....
Kudos, sir !
73,
Prem.
VA3UMA