Paul, Al and others -The resistor is a 1.5k, (1W is better). I don't know when Drake specifically changed over, but if your T-4XC doesn't already have the resistor between Pins 6 and 9 of V10, you need to add it. See attached sheet from the CD.
73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line and TR-4/C Service Supplement CDs <www.k4oah.com> Al Parker wrote:
Hi Paul, Garey must have gone out for a long supper. Here's what he said about 5 yrs ago: GAREY - K4OAH <[email protected]> made an utterance to the drakelist gang ----------------------------------------------------------------------Check your old relay. If it is a 15k ohm coil, you'll need to add a 1.5k, 1/2W resistor in series with the coil to replace it with the P&B R10-E1Y4-V2.5K relay available from Mouser, Digi-Key and others. The 15k relays were unreliable because of the very fine wire required to get the high impedance. The wire broke either at the terminals from corrosion or inside the coil from temperature excursions. The replacement is very reliable.73, Garey - K4OAH Atlanta ------------------------------------------------------Since you don't have your old relay, maybe you should add a 15k res. & see if it works. But maybe with your T-4XC it's late enough that the replacement would have gone in at the factory. Butt -- Garey's old response did have T-4XC in the subject.
T-4XC Relay Replacement.pdf
Description: acrobat/pdf
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