Schematic Searching
We get a lot of queries from persons regarding unknown
origin radios. Most have no manufacturer's name, some may
have a model number, while others have a chassis or none
of the above. In these cases, we can do what we call a
"search schematic". We need to know as much as you can
tell us about the radio, how many tubes, and what the tube
types are. Battery , AC or AC/DC.? Sometimes a diagram of
the top of the chassis showing placement of the parts and
especially of the tubes helps to identify the radio. We can
generally find a correct schematic based on having this
information prior to our search. A search can take several
hours so our charge of $ 18.00 for the search we believe to
be quite reasonable. This is the charge for Riders searches.
The cost for an SMS schematic is harder because there are no
tube cross-indexes and we have to search multiple schematics
one of a time. The charge for an SMS Search is $ 35.00.
Most of the time, we either find an exact match, or a near match.
In the early days of Radio, many of the radios that were built were
built from parts made by various manufacturers, were built in home
made or low production cabinets and ended up with names on them that
no one has ever heard of. The best we can do is to search
for schematic by the tube compliment as the tube types dictate
the type of circuit components are needed to make the radio
work. Fortunately, these radios were generally early AC
broadcast radios or were battery radios and both had very
little sophistication as far as the circuits were concerned.
If we can't find the exact match, we will get you a diagram
that is very similar and should be good or close enough to
figure out how to repair the radio. In some cases, where you provide us
with exacting detail about what you have, we may find the "Exact" match
for your radio. In other cases, we will get very close but in 99% of the
cases, the tubes will match so you should be able to use it to repair your
radio. Make sure that you send us the correct tube types. On many radios,
the tube sockets were marked with the proper tube number, yet on others
there is no such marking. Sometimes people substituted tubes and if the
radio is not working, it is possible someone put in the wrong type tube in
the wrong socket. The charge for a search is really for the labor, not the
schematic, even though we will send you what we find.
The cost for a search in the Riders series is $ 18.00. A cost for a
search in the SMS series is $ 35.00. The difference in the two costs
is that it takes much longer to do an SMS search because there is less tube
data known and cross indexing of tubes in the SMS series, hence we have to
start pulling schematics from drawers one by one to do the search.
If you want to order, you can do so by email with name,
mailing address, city/state/zip, a phone number where you
can be reached and your credit card data. Or you can order on
the internet on our web at http://www.radioera.com/order.asp and just
fill in all the blanks. Make sure you email us with the tube data, we
repeat, we MUST KNOW how many tubes, the tube types and how many of each
type. WITHOUT THIS DATA, we cannot do anything and we don't want to waste your
money with giving you partial information because you didn't give us enough data . . .
In any event, please understand that this service is a labor
of love of old radios, not really a labor of making money. I
have spent as little as 20 minutes on some searches but over
1 day on others. Think about it, would you work for $ 18 for
a fruitless search of labor for one day?
Thanks for reading and understanding what we both must do to be successful
in finding these no-named radio schematics!
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