Changing caps on the kenwood r 599??

[KF6PJW]

the parts list says their is (2) 1000 uf caps for the power supply ok thats fine but they have three terminals two pos and one neg can't seem to find this type of cap on line any one help?

[W9GB]

The parts list for the Kenwood R-599 receiver notes that (2) 1000 uf caps are used in the power supply section.
OK that's fine, but these capacitors have three terminals Two positive and One negative.
I can't seem to find this type of capacitor on line. Any help?

This part (2 positive lugs, 1 negative lug) is referred to as: Multi-section or Dual-section electrolytic capacitor.

Are you POSITIVE that these capacitors are bad ??
The R-599 is a solid-state receiver ... SO the voltage rating for these capacitors should not be above 50 or 63 VDC .

Modern Single section electrolytics (Screw or Snap-in) might be appropriate -- BUT -- that requires READING and understanding the power supply section of the Kenwood R-599 schematic diagram.

THEN Determine if these Dual sections filter different DC power supply rails (voltages) OR they are tied together (parallel) for a higher capacitance value.

w9gb

[W5RKL]

This part (2 positive lugs, 1 negative lug) is referred to as: Multi-section or Dual-section electrolytic capacitor.

Are you POSITIVE that these capacitors are bad ??
The R-599 is a solid-state receiver ... SO the voltage rating for these capacitors should not be above 50 or 63 VDC .

Modern Single section electrolytics (Screw or Snap-in) might be appropriate -- BUT -- that requires READING and understanding the power supply section of the Kenwood R-599 schematic diagram.

THEN Determine if these Dual sections filter different DC power supply rails (voltages) OR they are tied together (parallel) for a higher capacitance value.

w9gb

I agree with Greg, check the capacitors first before you replace them. If they do not show any signs of physical leakage or the power supply has AC ripple on the B+, there's no need to
replace them. The capacitors are C6 (1000ufd 25VDC), C7 (2000ufd 25VDC) and C8 (1000ufd 25VDC). The supply is a simple capacitive input PI filter with C6 connected in parallel through a 10 ohm resistor (R4) with C7 at the filter's output. My R-599D has the original factory filter capacitors and none of the caps show any signs of physical or electrical failure nor do I hear any AC ripple (hum) from the power supply.

73s
Mike
W5RKL

[KF6PJW]

wow Thanks for those great answers. I do hear a little bit of hum with the earphones but not enough to replace them .I have in the past replaced caps for music amps and that fixed those problems so I just figured the same for this one too, but I think Ill take your advice and leave it alone as it is working just fine.. best receiver I've ever owned. but hang on I getting the transmitter in a few days we'll see what that brings ... thanks again u guys your the fantastic. cap.

[W9GB]

I do hear a little bit of hum with the earphones but not enough to replace them .I have in the past replaced caps for music amps and that fixed those problems

Minor hum with headphones is NOT uncommon with radio gear. Do you have flouescant lights or the "new lightbulbs" at your operating positon ??

Most headphones have poor shielding on cable to TRS plug or at earpieces.

[AF6LJ]

wow Thanks for those great answers. I do hear a little bit of hum with the earphones but not enough to replace them .I have in the past replaced caps for music amps and that fixed those problems so I just figured the same for this one too, but I think Ill take your advice and leave it alone as it is working just fine.. best receiver I've ever owned. but hang on I getting the transmitter in a few days we'll see what that brings ... thanks again u guys your the fantastic. cap.

That's normal, I have a R-599A I picked up for a song on E-Bay some years back.
The main thing you are going to have trouble finding are the lamps for the dial and the S-Meter. I have LED replacements, which require a minor modification for proper operation. In other words they are not drip in replacements in spite of being the same physical configuration as the incandescent bulbs.

[KF6PJW]

Well Thank you sue, I guess you just put a resistor and a led on the same line to work? Cap...

[W4OP]

I have restored 2 sets of 599D twins and the PS caps on both receivers were in good shape. One of the TX's blew fuses though until I replaced the HV caps. Mouser sells a cap whose diameter is identical to the originals. Much shorter of course.

Dale W4OP

[KF6PJW]

Hi Dale Say do you have the Mouser order or part numbers for those caps.??? Thanks a bunch.

[W9GB]

Kenwood T-599S Service Manual
http://www.n6wk.com/kenwood/T599S%20...e%20Manual.pdf

Turning to the T-599S parts list ..... C23 and C24 are listed as Dual Section 220 uF at 500 VDC
However, the schematic shows the usage of two 100 uF 500 VDC capacitors (C23, C24) in the HV power section. What would be the advantage of this approach for HV to S2001/6146 final tubes?

CDE 550C series (Screw Terminals) is a 500 VDC high quality part.
http://www.cde.com/catalogs/550C.pdf

CDE 380/382 series (Snap-In) in wide variety of sizes (diameter, height) and up to 500 VDC
The 382 series are multiple pins, functional in 50 mm diameter size.
http://www.cde.com/catalogs/380-382.pdf

Mouser is a CDE distributor.

Replacing Electrolytic Capacitors -- Educational
http://www.nmr.mgh.harvard.edu/~reese/electrolytics/

Parts Connexion -- Canada (Capacitors)
Avoid the obvious Audiophile price traps, but they do carry wide assortment of Asian mfg.
http://www.partsconnexion.com/capacitor_ele_all.html