w2aew | #390 Kit Build: CFT1 5-band CW Field Transceiver - build / adjust / align / test @w2aew | Uploaded September 2024 | Updated October 2024, 1 hour ago.
(this is an update of video #389 which had an error in it)
This video shows the process of building and adjusting/aligning the CFT1 5-band CW portable transceiver. It includes tips on assembly and soldering, as well as details on winding toroids (optional pre-wound available), and the final adjustment/alignment process. Here are the "chapters" of this video:
00:00 Introduction to the CFT1
00:47 Kit components
02:03 Prep / de-burn the circuit boards
02:39 Axial inductor installation
03:27 Ceramic capacitor installation
06:06 Crystal, TO-92 PNP transistor and electrolytic capacitor install
08:10 DC power jack, BNC, 2x11 pin socket install
09:40 IRF510 preparation and install
12:03 Toroid inductor winding and installation
16:25 Bifilar transformer winding and installation
17:58 3.4mm jacks, 2x3 header, power switch and 2x11 pin header install
20:13 LCD Panel install
21:37 Volume pot, pushbutton switches, LED and encoder install
22:57 Initial electrical test
24:08 LCD contrast adjustment
25:16 Mechanical assembly
26:41 Front panel installation
27:35 RF board and backend assembly
28:28 Intro to Adjustments and Alignment
28:50 10MHz reference oscillator adjustment
31:04 IF Alignment
33:14 PA Bias adjustment
36:36 PA RF Power output adjustment
37:58 Final assembly of back panel
38:19 Quick on-air check out
38:44 Summary

Where to buy:
hamgadgets.com/cft1-by-km4cft.html
My video on winding toroids:
youtube.com/watch?v=sDIWNHOoNh8
Zero Beating against WWV:
youtu.be/QCJ4cQGOQLI?si=ldLzplZ40pklkMbK