The best recommendation for KMA "B” Batteries 
is the letters from our customers when they reorder 
year after year. Their reports tell a remarkable 
story. Service oftentimes ranging from twelve 
months to two years, and many instances, of service 
superior to nationally known high priced batteries. 
I assure you that it is not possible to get a higher 
quality “B” battery. Tests have proved that these 
KMA batteries give more listening power than the 
average, and they are certainly built of the very 
finest materials through and through. 
After months and months of ordinary use, the 
comeback of these big batteries will amaze you. 
Their long life makes them cost far less because 
when ordinary batteries would be worn out, KMA 
batteries still keep going. 
KMA RADIO TUBES 
For longer Life, More Listening Power, and 
Guaranteed Service 
Friends, you can’t buy a better tube for your 
radio so why pay higher prices? Good tubes mean 
good reception, so replace the weak ones with these 
KMA Quality Tubes. Every one is guaranteed to 
give you at least one year of good, satisfactory serv¬ 
ice unless burned out by accidental overload or 
abuse. All are manufactured and licensed under 
RCA patents and triple tested to assure perfect re¬ 
sults in your radio. 
Radio Tubes—Postpaid Prices 
Tubes for Battery Sets 
201A Amplifier and detector.$0.39 
112A Power tube .80 
171A Power tube .59 
UV199 Amplifier and detector. 1.45 
UX199 Amplifier and detector. 1.25 
TJX1.20 Dry cell power tube. 1.45 
230 Two volt amplifier. 60 
231 Two volt power tube.60 
232 Two volt screen grid . ..95 
233 Two volt Pentode .*. 1.10 
234 Two volt Pentode. 1.05 
222 3.3 volt screen grid. 1.25 
19 Class B power tube.95 
Tubes for Electric Sets 
226 AC Amplifier.$0.49 
227 Amplifier and detector.49 
224A Screen Grid amplifier..80 
235 Super Control screen grid.80 
56 Special AC amplifier.59 
57 Triple Grid amplifier.80 
58 Super Control amplifier.80 
280 Full Wave Rectifier.49 
282 Mercury Vapor Rectifier.70 
245 Power tube.59 
246 Class B power tube. 90 
247 Pentode powpr tube.80 
25Z5 Rectifier .95 
All radio lube» postpaid anywhere in U. S. A. 
POSTPAID PRICES 
"B" Batteries 
KMA HEAVY DUTY "B” BATTERIES —45 volt, recommended for 
average five or six tube radio. $1.45 each; 2 for $2.85; 3 for $4.25. 
KMA SUPER HEAVY DUTY "B” BATTERIES (Giant type) — 
45 volt, recommended for the larger sets and heaviest loads. 
$1.95 each; 2 for $3.85; 3 for $5.75. 
KMA STANDARD SIZE “B” BATTERIES— 45 volt. Use this bat¬ 
tery only on small radios. $1.15 each; 2 for $2.25; 3 for $3.30. 
"C" Batteries 
It pays to put new “C” Batteries on the radio every time you 
buy new “B” Batteries. They keep the load balanced. 
4 Vi volt “C” Battery. Each. 25c 
22Vi volt combination “B” and “C” Battery. Each.... 75o 
RADIO "A" 
BATTERIES 
Special 
200A 6 Volt Radio 
Battery 
Only has to be re¬ 
charged half as often 
as the ordinary size 
radio battery and 
gives twice as much 
service on each re¬ 
charge. The ideal power supply for all 6 volt radio sets. Extremely 
heavy, built with big, heavy plates like the farm light plant bat¬ 
teries and insulated with rubber. Continuous service for over four 
years not uncommon. Every battery fully charged and ready to 
use as received. Price — $11.50 F. O. B. Shenandoah. 
Two-Volt Radio "A" Battery 
For sets using new low drain tubes 
This is the most economical battery for the new two volt radio 
sets. Only has to be recharged once every three months under 
average conditions. 
Heavy plate construction means long life and dependable serv¬ 
ice. Shipped fully charged and ready to use. ap 
Price — F. O. B. Shenandoah.^>0.70 
KMA AUTOMOBILE BATTERIES 
Powerful—Dependable 
No. 13A STANDARD 13 PLATE. A battery equalling new car 
equipment in capacity and service. Twelve months 
guarantee. New low price . 
$5.75 
NO. 15A—SPECIAL WINTER BATTERY—FIFTEEN PLATE 
TYPE. This is a battery I recommend for cold weather service. 
Use it in place of the 13 plate size for quick starting. 
Eighteen months guarantee. New low price. 
F. O. B. Shenandoah 
$4.95 
KMA Has More POWER 
So Have KMA Batteries 
KMA Heavy Duty 45 Volt "B" 
Batteries 
POWER 
MORE 
for your 
LISTENING 
RADIO 
Earl C. May Seed Co., Shenandoah, Iowa—Page 39 
