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#1
12-07-2008, 03:58 PM
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Want to get started with some recapping?
This should help get your feet wet. It's the list of capacitors in an R-390A general coverage communications receiver.
Nolan's R-390A/URR Master Capacitor List Revision 0.4a BETA (01/13/02) --------------------------------------------------- -----Main Chassis (front and rear panel, etc.)----- --------------------------------------------------- C101 0.22mf 100 WVDC 20% paper C102 5000pf 1000 WVDC 15% ceramic C103 50mf 50 WVDC ??% electrolytic industry # CE64C500G (1) C104 0.068mf ??? WV?C ??% paper (inside of line filter) C105 0.068mf ??? WV?C ??% paper (inside of line filter) C106 0.068mf ??? WV?C ??% paper (inside of line filter) C107 0.068mf ??? WV?C ??% paper (inside of line filter) (1) This is the bathtub style capacitor mounted below the line filter on the rear panel. It is NOT an oil filled paper cap even though it looks like one. Watch the polarity. --------------------------------- -----RF Amplifier Subchassis----- --------------------------------- C201A 3-12pf 350 WVDC NPO ceramic trimmer (inside of T201) C201B 8-50pf 350 WVDC N750 ceramic trimmer (inside of T201) C202 7pf 500 WVDC .25pf ceramic (inside of T201) C203 330pf 500 WVDC 2% mica (inside of T201) C204 120pf 500 WVDC 2% mica (inside of T201) C205A 3-12pf 350 WVDC NPO ceramic trimmer (inside of T202) C205B 8-50pf 350 WVDC N750 ceramic trimmer (inside of T202) C206 7pf 500 WVDC .25pf ceramic (inside of T202) C207 120pf 500 WVDC 2% mica (inside of T202) C208 75pf 500 WVDC 2% mica (inside of T202) C209A 3-12pf 350 WVDC NPO ceramic trimmer (inside of T203) C209B 8-50pf 350 WVDC N750 ceramic trimmer (inside of T203) C210 7pf 500 WVDC .25pf ceramic (inside of T203) C211 36pf 500 WVDC 2% mica (inside of T203) C212 39pf 500 WVDC 2% mica (inside of T203) C213A 3-12pf 350 WVDC NPO ceramic trimmer (inside of T204) C213B 5-25pf 350 WVDC NPO ceramic trimmer (inside of T204) C214 7pf 500 WVDC .25pf ceramic (inside of T204) C215 100pf 500 WVDC 2% mica (inside of T204) C216 24pf 500 WVDC 5% mica (inside of T204) C217A 3-12pf 350 WVDC NPO ceramic trimmer (inside of T205) C217B 3-12pf 350 WVDC NPO ceramic trimmer (inside of T205) C218 7pf 500 WVDC .25pf ceramic (inside of T205) C219 5pf 300 WVDC .5pf mica (inside of T205) C220 12pf 500 WVDC 5% mica (inside of T205) C221A 3-12pf 350 WVDC NPO ceramic trimmer (inside of T206) C221B 1.5-7pf 350 WVDC NPO ceramic trimmer (inside of T206) C222 7pf 500 WVDC .25pf ceramic (inside of T206) C223 18pf 500 WVDC 5% mica (inside of T206) C224 5pf 300 WVDC .5pf mica (inside of T206) C225A 7-80pf 800 WVAC 4pf variable (front half of antenna trimmer cap) C225B 6-26pf 800 WVAC 2pf variable (rear half of antenna trimmer cap) C226 5000pf 1000 WVDC 15% ceramic C227 0.047mf 100 WVDC 20% paper (4)(z) C228 1pf 500 WVDC .25% ceramic C229 5000pf 1000 WVDC 15% ceramic C230-1 8-50pf 350 WVDC N750 ceramic trimmer (inside of Z201-1)(z) C230-2 8-50pf 350 WVDC N750 ceramic trimmer (inside of Z201-2)(z) C231-1 160pf 500 WVDC 2% mica (inside of Z201-1)(z) C231-2 160pf 500 WVDC 2% mica (inside of Z201-2)(z) C232-1 2400pf 300 WVDC 2% mica (inside of Z201-1)(z) C232-2 2400pf 300 WVDC 2% mica (inside of Z201-2)(z) C233-1 8-50pf 350 WVDC N750 ceramic trimmer (inside of Z202-1) C233-2 8-50pf 350 WVDC N750 ceramic trimmer (inside of Z202-2) C234-1 1800pf 500 WVDC 2% mica (inside of Z202-1) C234-2 1800pf 500 WVDC 2% mica (inside of Z202-2) C235-1 2400pf 300 WVDC 2% mica (inside of Z202-1) C235-2 2400pf 300 WVDC 2% mica (inside of Z202-2) C236-1 8-50pf 350 WVDC N750 ceramic trimmer (inside of Z203-1) C236-2 8-50pf 350 WVDC N750 ceramic trimmer (inside of Z203-2) C237-1 120pf 500 WVDC 2% mica (inside of Z203-1) C237-2 120pf 500 WVDC 2% mica (inside of Z203-2) C238-1 1500pf 300 WVDC 10% mica (inside of Z203-1) C238-1 1500pf 300 WVDC 10% mica (inside of Z203-2) C239-1 5-25pf 350 WVDC NPO ceramic trimmer (inside of Z204-1) C239-2 5-25pf 350 WVDC NPO ceramic trimmer (inside of Z204-2) C240-1 68pf 500 WVDC 2% mica (inside of Z204-1) C240-2 68pf 500 WVDC 2% mica (inside of Z204-2) C241-1 470pf 300 WVDC 2% mica (inside of Z204-1) C241-2 470pf 300 WVDC 2% mica (inside of Z204-2) C242-1 3-12pf 350 WVDC NPO ceramic trimmer (inside of Z205-1) C242-2 3-12pf 350 WVDC NPO ceramic trimmer (inside of Z205-2) C243-1 68pf 500 WVDC 2% mica (inside of Z205-1) C243-2 68pf 500 WVDC 2% mica (inside of Z205-2) C244-1 1800pf 500 WVDC 2% mica (inside of Z205-1) C244-2 1800pf 500 WVDC 2% mica (inside of Z205-2) C245-1 3-12pf 350 WVDC NPO ceramic trimmer (inside of Z206-1) C245-2 3-12pf 350 WVDC NPO ceramic trimmer (inside of Z206-2) C246-1 47pf 500 WVDC 2% mica (inside of Z206-1) C246-2 47pf 500 WVDC 2% mica (inside of Z206-2) C247-1 33pf 500 WVDC 2% mica (inside of Z206-1) C247-2 33pf 500 WVDC 2% mica (inside of Z206-2) C248 5000pf 1000 WVDC 15% ceramic C249 .5pf 500 WVDC .25pf ceramic C250 .75pf 500 WVDC .25pf ceramic C251 1pf 500 WVDC .25% ceramic C252 2pf 500 WVDC .25% ceramic C253 4pf 500 WVDC .25pf ceramic C254 8pf 500 WVDC .25pf ceramic C255 33pf 500 WVDC 2% mica C256 0.1mf 200 WVDC 10% paper (5)(z) C257 47pf 500 WVDC 5% ceramic (z) C273 5000pf 1000 WVDC 15% ceramic C274 5000pf 1000 WVDC 15% ceramic C275 0.033mf 300 WVDC 20% paper (z) C276 15pf 500 WVDC 5% mica C277 5000pf 1000 WVDC 15% ceramic C278 15pf 500 WVDC 5% mica C279 15pf 500 WVDC 5% mica C280 5000pf 1000 WVDC 15% ceramic C281 1.5pf 500 WVDC .25% ceramic C282 1.5pf 500 WVDC .25% ceramic C283-1 5-25pf 350 WVDC NPO ceramic trimmer (inside of Z213-1) C283-2 5-25pf 350 WVDC NPO ceramic trimmer (inside of Z213-2) C283-3 5-25pf 350 WVDC NPO ceramic trimmer (inside of Z213-3) C284 5000pf 1000 WVDC 15% ceramic C285 5000pf 1000 WVDC 15% ceramic C286 100pf 500 WVDC 2% mica C287 5000pf 1000 WVDC 15% ceramic C288 5000pf 1000 WVDC 15% ceramic C289 2pf 500 WVDC .25% ceramic C290 2pf 500 WVDC .25% ceramic C291-1 5-25pf 350 WVDC NPO ceramic trimmer (inside of Z216-1) C291-2 5-25pf 350 WVDC NPO ceramic trimmer (inside of Z216-2) C291-3 5-25pf 350 WVDC NPO ceramic trimmer (inside of Z216-3) C292-1 100pf 500 WVDC 2% mica (inside of Z216-1) C292-2 100pf 500 WVDC 2% mica (inside of Z216-2) C292-3 100pf 500 WVDC 2% mica (inside of Z216-3) C297 5000pf 1000 WVDC 15% ceramic C298 5000pf 1000 WVDC 15% ceramic C299 270pf 300 WVDC 2% mica (inside of T208) C300 5000pf 1000 WVDC 15% ceramic C301 5000pf 1000 WVDC 15% ceramic C302 5000pf 1000 WVDC 15% ceramic C303 5000pf 1000 WVDC 15% ceramic C304 5000pf 1000 WVDC 15% ceramic C305 5000pf 1000 WVDC 15% ceramic C307 5000pf 1000 WVDC 15% ceramic C308 5000pf 1000 WVDC 15% ceramic C309 0.1mf 200 WVDC 10% paper C310 3-60pf 850 WVAC ??? variable (calibration trimmer) C311 1000pf 500 WVDC 2% mica C312 150pf 500 WVDC 2% mica C313 220pf 500 WVDC 2% mica C314 220pf 500 WVDC 2% mica C315 220pf 500 WVDC 2% mica C316 15pf 500 WVDC 5% mica C317 5000pf 1000 WVDC 15% ceramic C318 51pf 500 WVDC 2% mica C319 5000pf 1000 WVDC 15% ceramic C320 1000pf 500 WVDC 2% mica C321 12pf 500 WVDC 5% mica C322 12pf 500 WVDC 5% mica C323 5pf 300 WVDC .5pf mica C324 20pf 300 WVDC 5% mica C325 200pf 500 WVDC 1% mica C326 5000pf 1000 WVDC 15% ceramic C327 100pf 500 WVDC 2% mica C328 5000pf 1000 WVDC 15% ceramic C329 68pf 500 WVDC 2% mica C330-1 300pf 500 WVDC 2% mica (inside of Z201-1) C330-2 300pf 500 WVDC 2% mica (inside of Z201-2) C331-1 68pf 500 WVDC 2% mica (inside of Z202-1) C331-2 68pf 500 WVDC 2% mica (inside of Z202-2) C334 51pf 500 WVDC 2% mica (z) actual value depends on mod level, I'll add details when I have time (4) This is the stud mounted oil filled capacitor located on the top side of the chassis next to V201, the 6DC6. (5) Not used on early receivers. C256 is used to silence hash/static from HR202 Crystal Oven. Less expensive CDE polyester should work fine at this location. --------------------------------------- -----Crystal Oscillator Subchassis----- --------------------------------------- C401 5000pf 1000 WVDC 15% ceramic C402 5pf 300 WVDC .5pf mica C403 4pf 500 WVDC .25pf ceramic C404 4pf 500 WVDC .25pf ceramic C406 5000pf 1000 WVDC 15% ceramic C407 5000pf 1000 WVDC 15% ceramic C408 12pf 500 WVDC 5% ceramic C409 150pf 500 WVDC 2% mica C410 5000pf 1000 WVDC 15% ceramic C411 5000pf 1000 WVDC 15% ceramic C412 5000pf 1000 WVDC 15% ceramic C413 5000pf 1000 WVDC 15% ceramic C414 5000pf 1000 WVDC 15% ceramic C415 5000pf 1000 WVDC 15% ceramic C417 150pf 500 WVDC 2% mica C418 120pf 500 WVDC 2% mica C419 100pf 500 WVDC 2% mica C420 82pf 500 WVDC 2% mica C421 68pf 500 WVDC 2% mica C422 56pf 500 WVDC 2% mica C423 47pf 500 WVDC 2% mica C424 39pf 500 WVDC 2% mica C425 33pf 500 WVDC 2% mica C426 18pf 500 WVDC 5% mica C427 12pf 500 WVDC 5% mica C428 5pf 300 WVDC .5pf mica C429A 8-50pf 350 WVDC NPO ceramic trimmer for 9 MHz C429B 8-50pf 350 WVDC NPO ceramic trimmer for 8 MHz C429C 5-25pf 350 WVDC NPO ceramic trimmer for 15 MHz C429D 5-25pf 350 WVDC NPO ceramic trimmer for 14 MHz C429E 5-25pf 350 WVDC NPO ceramic trimmer for 4&21 MHz C429F 5-25pf 350 WVDC NPO ceramic trimmer for 3&20 MHz C429G 5-25pf 350 WVDC NPO ceramic trimmer for 27 MHz C429H 5-25pf 350 WVDC NPO ceramic trimmer for 26 MHz C430A 8-50pf 350 WVDC NPO ceramic trimmer for 11 MHz C430B 8-50pf 350 WVDC NPO ceramic trimmer for 10 MHz C430C 5-25pf 350 WVDC NPO ceramic trimmer for 0&17 MHz C430D 5-25pf 350 WVDC NPO ceramic trimmer for 16 MHz C430E 5-25pf 350 WVDC NPO ceramic trimmer for 6&23 MHz C430F 5-25pf 350 WVDC NPO ceramic trimmer for 5&22 MHz C430G 3-12pf 350 WVDC NPO ceramic trimmer for 29 MHz C430H 5-25pf 350 WVDC NPO ceramic trimmer for 28 MHz C431A 5-25pf 350 WVDC NPO ceramic trimmer for 13 MHz C431B 5-25pf 350 WVDC NPO ceramic trimmer for 12 MHz C431C 5-25pf 350 WVDC NPO ceramic trimmer for 2&19 MHz C431D 5-25pf 350 WVDC NPO ceramic trimmer for 1&18 MHz C431E 5-25pf 350 WVDC NPO ceramic trimmer for 25 MHz C431F 5-25pf 350 WVDC NPO ceramic trimmer for 7&24 MHz C431G 3-12pf 350 WVDC NPO ceramic trimmer for 31 MHz C431H 3-12pf 350 WVDC NPO ceramic trimmer for 30 MHz --------------------------------- -----IF Amplifier Subchassis----- --------------------------------- C501 5000pf 1000 WVDC 15% ceramic C502 5000pf 1000 WVDC 15% ceramic C503 100pf 500 WVDC 2% mica C504 0.1mf 200 WVDC 10% paper C505 0.1mf 200 WVDC 10% paper C506 5000pf 1000 WVDC 15% ceramic C507 110pf 500 WVDC 2% mica for 16 KHz filter (x) C508 110pf 500 WVDC 2% mica for 8 KHz filter (x) C509 110pf 500 WVDC 2% mica for 4 KHz filter (x) C510 110pf 500 WVDC 2% mica for 2 KHz filter (x) C511 5000pf 1000 WVDC 15% ceramic C512 5000pf 1000 WVDC 15% ceramic C513 110pf 500 WVDC 2% mica for 2 KHz filter (x) C514 110pf 500 WVDC 2% mica for 4 KHz filter (x) C515 110pf 500 WVDC 2% mica for 8 KHz filter (x) C516 110pf 500 WVDC 2% mica for 16 KHz filter (x) C517 0.1mf 200 WVDC 10% paper C518 5000pf 1000 WVDC 15% ceramic C519 5000pf 1000 WVDC 15% ceramic C520 3-12pf 350 WVDC NPO ceramic trimmer (inside of Z501) C521 0.1mf 200 WVDC 10% paper C522 5000pf 1000 WVDC 15% ceramic C523 5000pf 1000 WVDC 15% ceramic C524 75pf ??? WVDC ??% ceramic (inside of Z501) C525 7-10.5pf 350 WVDC NPO ceramic trimmer (BFO neutralization) C526 100pf 500 WVDC 2% mica C527 5pf 300 WVDC .5pf mica C528 0.1mf 200 WVDC 10% paper C529 0.033mf 300 WVDC 20% paper C530 150pf 500 WVDC 2% mica C531 0.1mf 200 WVDC 10% paper C532 100pf 500 WVDC 2% mica C533 0.033mf 300 WVDC 20% paper C534 0.033mf 300 WVDC 20% paper C535 12pf 500 WVDC 5% mica C536 0.1mf 100 WVDC 20% paper C537 1800pf 500 WVDC 2% mica C538 0.1mf 200 WVDC 10% paper C539 1000pf 500 WVDC 2% mica C540 5000pf 1000 WVDC 15% ceramic C541 0.033mf 300 WVDC 20% paper C542 47pf 500 WVDC 2% mica C543 0.1mf 200 WVDC 10% paper C544 5000pf 1000 WVDC 15% ceramic C545 0.033mf 300 WVDC 20% paper C546 220pf 500 WVDC 2% mica C547 0.1mf 200 WVDC 10% paper C548 0.1mf 200 WVDC 10% paper C549 0.01mf 300 WVDC 20% paper C551 2.0mf 500 WVDC 10% oil filled paper (2) C552 5000pf 1000 WVDC 15% ceramic C553 0.01mf 300 WVDC 20% paper (3) C554 1600pf 100 WVDC 1% mica (inside of Z502 - BFO) C555 50pf ??? WV?C ??% ??? (inside of Z502 - BFO) C556 50pf ??? WV?C ??% ??? (inside of Z502 - BFO) C557 ???? ??? WV?C ??% ??? (inside of T501) C558 ???? ??? WV?C ??% ??? (inside of T501) C559 ???? ??? WV?C ??% ??? (inside of T502) C560 ???? ??? WV?C ??% ??? (inside of T502) C561 ???? ??? WV?C ??% ??? (inside of T503) C562 ???? ??? WV?C ??% ??? (inside of T503) C563 ???? ??? WV?C ??% ??? (inside of Z501) C564 8-50pf 350 WVDC N750 ceramic trimmer for 16 KHz filter (x) C565 8-50pf 350 WVDC N750 ceramic trimmer for 8 KHz filter (x) C566 8-50pf 350 WVDC N750 ceramic trimmer for 4 KHz filter (x) C567 8-50pf 350 WVDC N750 ceramic trimmer for 2 KHz filter (x) C568 8-50pf 350 WVDC N750 ceramic trimmer for 2 KHz filter (x) C569 8-50pf 350 WVDC N750 ceramic trimmer for 4 KHz filter (x) C570 8-50pf 350 WVDC N750 ceramic trimmer for 8 KHz filter (x) C571 8-50pf 350 WVDC N750 ceramic trimmer for 16 KHz filter (x) (x) value depends on mod level of IF deck. I'll add details later... (2) Oil filled metal can paper capacitor mounted to top side of chassis next to chassis harness connector. (3) Blocking cap for mechanical filters. Recommend working voltage of 600VDC or higher to help decrease the chance of frying the mechanical filters due to failure of C553. This is not a good location to use a cheap replacement capacitor. ---------------------------------------------- -----Audio Frequency Amplifier Subchassis----- ---------------------------------------------- C601 0.01 300 WVDC 20% paper C602 0.033 300 WVDC 20% paper C603 3X30uf 300 WVDC ??% Electrolytic (Industry # CE53C300N) C604 0.01 300 WVDC 20% paper (6) C605 0.01 300 WVDC 20% paper (6) C606 2X45uf 300 WVDC ??% Electrolytic (Industry # CE52C450N) C607 0.01 300 WVDC 20% paper C608 0.01 300 WVDC 20% paper C608 0.01mf 300 WVDC 20% paper C609 8uf 30 WVDC ??% Tantalum Electrolytic (7) C611 5000pf 1000 WVDC 15% ceramic C612 68pf 500 WVDC 2% mica (6) For improved audio performance, you can use .022uf caps at this location. (7) Also known as "the capacitor that rots off". Leaks sulfuric acid when the seals fail. Watch the polarity when replacing. ------------------------------ -----PTO (VFO) Subchassis----- ------------------------------ C701 370pf 500 WVDC 1% ???? (inside of PTO) C702 10pf ??? WV?C ??% ???? (inside of PTO) C703 10pf ??? WV?C ??% ???? (inside of PTO) C704 15pf 500 WVDC 2% ???? (inside of PTO C705 5000pf 1000 WVDC 10% ceramic (y) C706 1.5-8pf ??? WV?C ??% glass/silver piston trimmer (inside of Z702) C707 5000pf 1000 WVDC 10% ceramic (y) C708 5000pf 1000 WVDC 10% ceramic (y) C709 510pf 300 WVDC 2% mica (inside of Z702) C710 5000pf 1000 WVDC 15% ceramic C711 5000pf 1000 WVDC 15% ceramic C712 5000pf 1000 WVDC 10% ceramic (y) C713 5000pf 1000 WVDC 10% ceramic (y) C714 5000pf 1000 WVDC 10% ceramic (y) (y) C705, C707, C708, C712, C713, and C714 are all constructed into one unit. Some are epoxied together, some are in plastic holders, etc.
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I may be growing older, but I refuse to grow up. 
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#2
12-07-2008, 06:39 PM
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Oh my....
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In battle, in forest, at the precipice in the mountains, On the dark great sea, in the midst of javelins and arrows, In sleep, in confusion, in the depths of shame, The good deeds a man has done before defend him. --Bhagavad-Gita
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#3
12-07-2008, 07:26 PM
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Just so everybody understands, we're talkin' point-to-point wiring here. Printed circuit boards weren't really common in the late 1950's when this was first designed.
So don't think SMT, either.
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I may be growing older, but I refuse to grow up.
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#4
12-07-2008, 07:28 PM
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Oh, btw, there are certain capacitors that are actually, individually, famous.
Take C-553, for instance. This is known as the "death cap" because if it shorts out, it will take out your "unobtainium" mechanical filters.
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I may be growing older, but I refuse to grow up.
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#5
12-08-2008, 11:15 AM
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well, on the bright side about 50% of those can be taken off the table as they're trimmers, mica, or ceramic caps. Generally speaking those don't need to be messed with.
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Random bits of stuff in the collection: Yamaha YP-D4 turntable with B&O MMC 10E cart Allied 495 receiver 2 Magnavox amps, AMP150 and an AMP178, currently under the knife. Onkyo TX-4500 Onkyo Radian III speakers
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#6
12-08-2008, 11:25 AM
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Quote:
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I may be growing older, but I refuse to grow up.
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#7
12-08-2008, 11:31 AM
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The Hammarlund SP-600 is EVEN WORSE, if you can believe that....And R-390A caps are at least "relatively" easy to get to. Replacing the ones in an SP-600 has been known to make strong men weep....
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Benevolent Despot
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Linear Mode
