Heathkit SG-6 User Manual

The Heathkit Model SG-6 Signal Generator has been designed so that with simple easy assembly
the kit builder can construct a signal generator which will give him excellent performance and
is both pleasant and easy to use. This generator has been engineered so that it will be valuable
to the radio repairman, ham, or experimenter over a wide range of uses in addition to being a
rugged and highly dependable piece of test equipment'made of the highest quality parts through-
out.
PRELIMINARY
INSTRUCTIONS AND NOTES
Before starting construction be certain to read the manual through completely and note all dia-
grams and pictorials. In the step by step procedure, when actually assembling and wiring, read
the whole article through (articles are numbered 1, 2, 3, etc.) so that no suggestions in the article
will be missed.
To facilitate describing the location of parts, solder lug positions have been numbered, and tube
socket positions have been lettered as in Figure 1. Refer to this figure when instruc'tions say,
"mount solder lugs 4 and 5, etc."
Also note that both the schematic diagram and Figures 5 and 11 show all switch contact lugs
numbered. The code is as follows: for example, M3 indicates, M for modulation switch and 3
for contact solder lug 3. BR6 means, B for bandswitch, R for rear deck, and 6 for contact lug 6.
Therefore when mounting switches, be sure to mount them with the same relative position as
shown in the pictorials. Likewise, be sure and mount tube sockets as pictured.
When wiring, and instructions say, "connect to right hand lug of the two lug terminal strip, etc."
consult Figure 1 for clarity.
It is recommended that tube sockets A and B on figure 1 be actually labeled A and B on the chas-
sis with a pencil. Also writing the names of the controls on the inside of the chassis where wir-
ing is done will reduce the possibility of wiring to improper controls by mistake. An A, B, C,
D, or E written by the coils on the sub-chassis might prove helpful.
Read the note on soldering on the inside of the back cover. Make a good mechanical joint of each
connection with clean metal to clean metal. Use only good quality rosin core radio type solder.
Pastes or acids are difficult to remove and minute amounts left combine with moisture from the
air forming a corrosive product. Weeks or months later corrosion may result in untimely fail-
ure.
•
NOTE: ALL GUARANTEES ARE VOIDED AND WE WILL NOT REPAIR OR SERVICE IN-
STRUMENTS IN WHICH ACID CORE SOLDER OR PASTES ARE USED.
Small changes in parts may be , made by the Heath Company. Any part supplied will work just
as well as the part for which it was substituted. All substitutions will be of equal or better qual-
ity than the original, and will be made in order that a minimum delay will occur in filling your
order.
Resistors aqd controls have a tolerance rating of plus or minus 20% unless otherwise stated.
Therefore a lOOK ohms resistor may test between 80K and 120K ohms. The letter K stands for
1,000 and M for 1,000,000. Thus.a resistor marked 90K=90,000 Ohms, etc. Frequently conden-
sers show an even greater variation such as minus 50% to plus 100%. This Heathkit is designed
to accomodate such variation .
The tube socket pins are numbered from 1 to 7 starting at the spacing and reading clockwise
when viewed from the bottom. See Figure 2.
A
circuit description is included in a later section of this manual so that those with some knowl-
edge of radio will be able to obtain a clearer picture as to the actual workings of this equipment .
It is not expected that those with little radio experience will understand the description com-
pletely, but it should be of help in the event that they desire to become more familiar with cir-
cuit operation and thus learn more from building the kit than just the placing of parts and wiring.
In any case, this section points out the use of the various controls and switches.
Page 2

Heathkit SG-6 Specifications

General

Brand	Heathkit
Model	SG-6
Category	Measuring Instruments
Language	English