| yl2gl | Дата: Четверг, 21.10.2010, 13:45 | Сообщение # 1 |
|
Админ
Группа: Администраторы
Сообщений: 1124
Статус: Offline
| Попалась на глаза интересная схема CW QRP трансивера на 20 метровый диапазон с промежуточной частотой 10 мГц, выходной мощностью 1.5 Вт, под названием Mark1, автора NN1G:
Вариант схемы с моточными данными катушек и типов транзисторов:
73! YL2GL Валерий
|
| |
| |
| yl2gl | Дата: Четверг, 17.12.2015, 16:23 | Сообщение # 2 |
|
Админ
Группа: Администраторы
Сообщений: 1124
Статус: Offline
| Вот что пишет автор:
-"Here are pictures of my NN1G Mark I 20m QRP transceiver. It is VFO controlled, with full QSK, and power output is about 1.5 Watts. The receiver is a single-conversion superhet with a 4-pole crystal filter in the i-f. The radio runs on 13.8 VDC. The rig was built from a semi-kit, and was designed by Dave Benson, NN1G. I've added a Curtis 8044B keyer, an audio filter (which is a clone of the optional filter that MFJ sold for their 90xx-series QRP rigs), and a relative power output meter. The tiny meter and the circuit behind it were stolen from a junked HyGain CB radio. The VFO dial uses a small Jackson Brothers vernier for smooth tuning. The dial is home-made.
Yes, the enclosure is a metal file card box, designed to hold 3" x 5" recipe cards! The front panel is aluminum, marked with rub-on transfer letters, and covered with clear self-stick Mylar film.
This rig is pretty much a complete station in a box. Just add DC power, antenna, key and/or paddles, and earphones, and you're on the air in QRP style!
You may have seen this one before. Pictures of it appeared in the July, 1994, issue of QRP-ARCI's "QRP Quarterly" magazine."
73! YL2GL Валерий
|
| |
| |
