MRL
Handbook No. 25
MRL 18 Crystal Set Circuits
Printed by Paul
Nelson on 100% acid free premium 70# text paper stock
Crystal circuits in the
handbook are all entirely different from those in HB-17. Thousands have been
sold to experimenters. Many are used in radio classes and clubs. The material
has been collected over a number of years and all circuits have been completely
worked out and tested. There are no tubes used. Complete parts lists are given
with each.
Some of the special
features of HB-25 are: #19 Pocket Radio, 3" square that IS selective;
#22DX Marvel that really gets the DX; #37 Push-button set tunes like an auto
radio; #28 Plug-in coil crystal set has a 6,000 mile DX record on Short Wave.
The ONLY way to start in
radio is by building some crystal sets, and then go to 1-tubers, etc. This
handbook will give you a good solid start. It give good, clear diagrams and a
chart to show you what symbols mean. All details are worked out.
One may spend their
lifetime with crystal experimenting and always learn something new. Xtal Diodes
are now being made for HF sets as their characteristics cannot be matched by
tubes. You will enjoy working with them.
Contents:
#19 Pocket Radio
#20 Simple Crystal Set
#21 Local Super-selective
#22 DX Marvel
#23 Combination DX Crystal
#24 Regenerative Crystal Set
#25 Selective Crystal Set
#37 Push-button Crystal Set
#27 Variable Selectivity Set
#28 Plug-in Coil DX Set
#29 Variometer Crystal Set
#30 DX Crystal Set
#31 Crystal S.W. Converters
#32 Pencil Crystal Set
#33 Selective Crystal Set
#34 Wired Wireless Crystal
#35 Prize Selector Crystal
#38 Crystal Booster
Radio Lingo Used
Coils
Wire sizes
Variable condensers
Crystals
Aerial and ground
Headphones
Long distance reception
3.75
postage paid U.S.A.