Discussion in 'VHF/UHF - 50Mhz and Beyond' started by W9RCK, Jun 5, 2015.
Just acquired with no manual and no power cable
---- 120 VAC ????
MANY Kenwood 4-pin CINCH plugs, in that era (TS-7400A), were only for 13.8 VDC.
The CINCH Connector is their 300 Series, Catalog here (Page 2-36)
The 4-pin Square is the "304" model.
KENWOOD TS-700A OPERATORS MANUAL
PAGE 6, Figure 1
This Cinch 4-pin (304) supports BOTH 120 VAC and 13.8 VDC --
WIRING MISTAKE COSTLY ($$)
KENWOOD TS-700 SERVICE MANUAL (from K9ROD)
PARTS LIST for DC Power Cord on Page 29, DC cable requires 5 Amp fuse.
USE a VOM/DVM and VISUAL INSPECTION to CONFIRM.
JAPANESE Clone Connectors of CINCH, sometimes mislabel Pin numbering (Yaesu FT-101 issue).
From Service Manual, it appears PINS 1 and 2 are for 120 VAC (internal 1 Amp fuse).
while PIN 3 is for +13.8 VDC and PIN 4 -13.8 VDC (requires external 5 Amp fuse).
S1 is your power switch, which has TWO isolated segments/wafers (13.8 DC; 120 AC).
I've got the TS-780 dual band and it has exactly the same connector. It's either 120/240VAC or 13.8VDC.
Download the manual; http://boxspringsonline.com/kenwood/1869-kenwood-ts-700s-instruction-manual
And just after page 25 is the diagram of the power connections. It's in the lower left hand corner of the schematic.
Like I stated, exactly like the TS-780 connection. Never stated it was a good idea to wire it that way, though. Just use proper care.
Hope this helps
When this Kenwood VHF All-Mode radio was new -- it was shipped with TWO Power cables.
One properly wired for 120 VAC, and the other for 13.8 VDC.
This is the Difference in purchasing Used Radios ---
Quality User Resellers versus Quick Dollar FLIPPERS.
A Quality Reseller would DIY Build those missing Power Cables (my approach),
and they have knowledge, skills, and patience -- to build them as good as factory (or better).