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MARANTZ 4415 VINTAGE QUAD AM/FM RECEIVER FULLY RESTORED You
are bidding on one 4415 Quad AM/FM Receiver. This unit is rated 15
watts per channel times 4 and will drive most speaker’s with ease. Faceplate
is in great condition (9.5/10). A few
light marks here and there with a few scraped on the edges. Corners are
perfect. Dial glass is almost perfect, hardly any light scratches from
cleaning. Faceplate and dial glass cleaned inside and out!! Marantz 4415 Overhaul Work/Data Sheet 10/21/2023 182 Components
Replaced Total 77 electrolytic
capacitors 1 potentiometer 1 rectifier stage 1 main filter
capacitor 11 lamps 8 output
transistors 1 germanium diode 6 resistors 4 switching diodes 47 transistors 24 film capacitors 1 ceramic
capacitors Work Performed Receiver stripped
down and cleaned thoroughly All switches and
controls cleaned and cycled numerous times with different cutting agents and
lubricants to ensure proper operation, finalized with Caig De-Oxit Face Plate and
knobs washed, polished and soaked in aluminum protector, dial glass
compounded Back panel and all
connections cleaned Wood cabinet
resurfaced and coated with dark walnut stain, metal grille sanded and coated
with satin black enamel All 11 lamps
replaced with LEDS New Vellum paper
installed behind number dial assembly All boards
completely hand re-soldered and flux cleaned to prevent crosstalk All 77 electrolytic
capacitors replaced with all high-quality ELNA SILMIC II Audio Graded
capacitors. Amplifier’s output coupling capacitors replaced with Nichicon KG
Gold Tune Audio Graded Capacitors. Power supply’s
adjustment potentiometer replaced with multi-turn type All 8 original
output transistors replaced with NOS original 2SD315 type, mounted to a
larger heatsink 6 resistors on the
amplifier driver boards replaced with 1% tolerance ½ watt replacements 1 germanium diode
on the right amplifier board tested poorly and was replaced 4 switching diodes
in the amplifier section replaced with 1N4148 type diodes 47 transistors
replaced. All power supply, amplifier driver board, pre-amplifier, phono
stage, dimension control board for four channel operation. On-Semi and
Fairchild types used. Gain Matched in signal areas 24 film capacitors
and two ceramic capacitors replaced with WIMA film low tolerance type on the
power supply, pre-amplifier, amplifier boards, phono stage and dimension
control board Power supply’s
rectifier stage for high current amplifier replaced with Com-chip 10A/400V
type 1 ceramic capacitor
on the power supply responsible for low current rectifier bypass replaced
with low tolerance polypropylene .01uf/250vdc replacement Main filter
capacitor replaced with Nichicon KG Gold Tune Audio Graded 10,000uf 50vdc
type Amplifier’s Idle
Current and DC offset values set to factory specification after overhaul and
re checked after burn in time Power supply’s
35VDC adjustment performed SQA plug resurfaced
and cleaned/lubed All modes tested, over 20 hours of run time to date This
unit does not have one of the optional SQA Decoders. As
with any electronic unit of this age, this item is sold AS-IS, but is
guaranteed to be as listed. This unit was operating properly and will be
packaged carefully, and should operate properly upon receipt. This
receiver will be packed well and local pick up is always available. Payment
is required in 3 days unless other arrangements have been made prior to
bidding. The
Boxed Shipping weight will be 40 lbs. Free UPS fully insured Shipping in
Continental US. Note: Shipping
overseas will run from $200.00 and up.
Please make sure you know the actual shipping cost before you place a
bid or make an offer. Thanks |