B. Hold the strip with the grounded lug that attaches to the chassis towards your RIGHT - The
lug closest to you is lug 1 and the next four lugs are lugs 2, 3, 4 and 5.
C. Connect one 330K 1 watt resistor (found in SCM bag) between lugs 1 and 2 - have the
resistor straight in line with the terminal strip and not on the side of the lug.
D. Connect a jumper wire between lugs 2 and 4 - have the jumper straight in line with the
terminal strip and not on the side of the lug. Arch the jumper over the top of lug 3.
E. Connect one 330K 1 watt resistor between lugs 4 and 5 - have the resistor straight in line
with the terminal strip and not on the side of the lug.
F. Connect a 6 inch wire to lug 1 on the side of lug 1 which faces the strip's chassis
attachment hole.
G. Connect a 3 inch wire to lug 5 on the side of lug 5 which faces the strip's chassis
attachment hole.
H.
Obtain one of the two supplementary caps and connect the NEGATIVE terminal of this cap
(the terminal with the GRAY STRIPE next to it) to lug 1 of the terminal strip. Connect it on
the side OPPOSITE the chassis attachment hole. You can straighten the capacitor pins to
better fit the terminal holes. (S) Fit the other lug of this cap into lug 2 of the terminal strip
(S)
I.
Fit the OTHER supplementary cap with the NEGATIVE terminal (the terminal with the
GRAY STRIPE next to it) in lug 4 (S) and the POSITIVE terminal in lug 5. You can straighten
the capacitor pins to better fit the terminal holes (S). Connect it like the other cap on the
side OPPOSITE the chassis attachment hole.
8.
Mount the RIGHT C24-X choke and the SCM on the RIGHT side of the chassis with two of the
larger 8-32 screws and matching kep nuts. Place the choke on first and the SCM mount hole on
top of the choke. When you mount the SCM, have the two SCM capacitors face the power
transformer. Tighten the two nuts. The two SCM caps may touch the chassis. This is OK.
9.
Mount the THREE lug terminal strip on the LEFT side of the chassis with a single 4-40 screw and
kep nut as shown on the pictorial. Use the screw hole closest to the power transformer. NOTE - If
the OPTIONAL VTA-TDR (Time Delay Relay) was shipped with your kit, you will install the TDR
INSTEAD OF the 3 lug terminal strip. Remove the VTA-TDR instruction sheets from the TDR parts
bag. Assemble the TDR and install it in place of the 3 lug terminal strip as instructed under the "B"
section of the TDR manual.
10.
Mount the RIGHT A-260-120 output transformer with 8-32 hardware. The side of the transformer
with the YELLOW-ORANGE-BROWN-BLACK leads must face the BACK of the amp. Mount the
LEFT output transformer and fit the SECOND C24-X choke under the far left nut closest to the
FRONT of the chassis. NOTE – This choke mounts with just that ONE nut and screw and may not
sit perfectly parallel to the side of the chassis as seen in the photo. The two wires on the choke
should face the INSIDE of the chassis. Check the pictorial and/or photo.
11. Mount the quadruple section filter capacitor in the special cutout. It is IMPORTANT that the quad
cap be properly oriented. The 80 Mfd SECTION which is designated with a HALF CIRCLE symbol
must face the BACK of the amp. Fasten by twisting each of the four mounting tabs one-quarter
turn with pliers.
12. Mount the two remaining grounding lugs in the single hole just to the left of the quad cap. Mount
them at a slight angle as seen in the pictorial. This will be your main grounding point for the entire
amp.
13.
Obtain the two DPDT switches from the triode/pentode kit bag. Install the switches in the two
chassis holes where the original Dynaco ST-70 bias controls use to be. These two 3/8” holes are
not shown on the main pictorial. The switches are a loose fit in the holes and must be centered in
the hole before they are tightened.
