Marantz Model 4230 AM/FM Stereo Quadraphonic Receiver & SQA-2 Adapter, Serviced
Vintage Marantz Model 4230 AM/FM Stereo Quadraphonic Quadradial Receiver & SQA-2 Adapter, Serviced Price: $1,774.99 + $74.99 Flat-rate ground shipping for US 48 states Description: Vintage, in really nice over-all condition, perhaps an 8 out of 10 for used gearSeller refurbished — See NOTES below for services performed Thoroughly cleaned, tested and recondition to ensure all knobs and buttons are in very satisfactory conditionVery clean inside and out with no major marks or corrosion (please see our pictures)Exactly as seen in pictures — very few marks on this receiver An electronic copy of the user’s manual will be emailed to buyer, if requestedIncludes rare Marantz SQA-2 adapter installed, serial # 7755All work performed by MC Mobile, Thousand Oaks, CASix month parts and labor warranty NOTES: 1. Repaired issue with one of the right channel amplifiers (two amplifiers per board) 2. Repaired an issue in the pre-amplfier channels (capacitors and active devices) 3. Checked & renewed amp bridging circuits (discrete 4 channel or 2 channel bridged) 4. Checked & renewed circuit that sets amp low frequency cutoff 5. FM tuner aligned & MPX sensitivity maximized (FM/FM stereo performance is great) 6, AM tuner aligned 7. DC offset checked and adjusted to as close to zero as possible 8. Amplifier idle current checked and reset to factory specification 9. All controls cleaned, and balance slide pot lubricated 10. All inputs checked including the phono input and preamp 9. Continuous power output measured at low, mid, and high frequencies with power output at approximately 16 W per channel at clip into 8 ohms in 4 channel mode 10. Power output measured at 1 kHz into 8 Ohms in 2 channel (bridged) mode, and is approximately 38 W RMS per channel 11. Failed dial and indicator bulbs replaced with new 12. Permanent PCB fuse for front lighting replaced with standard AGC fuse holder and AGC fuse for easy replacement if ever necessary (see our pics) 13. Optional Marantz SQA-2 adapter installed and checked, so the receiver will do discrete quad and synthesized quad with the optional adapter A great 4230 receiver from our private collection with the rare second generation SQA adapter installed. The FM tuner performance is about the best we have seen for a Marantz receiver. If purchased, please do not disssamble or remove any part of this receiver including the SQA-2. If there are any issues, please contact us using the information from our tag on the bottom of the receiver. Some Original Specifications:Tuning range: FM, MWPower output: 30W/ch (stereo), 12W/ch into 4Ω (quadraphonic)Frequency response: 20Hz to 20kHzTotal harmonic distortion: 0.9%Damping factor: 20Input sensitivity: 2.2mV (MM), 150mV (line)Dimensions: 17 21/64 x 5 25/64 x 14 3/8 inches (440 x 137 x 365 mm)Weight: 31.3 lbs (14.2 kg)First Year 1973 – Last Year 1978Wood Case WC-122, WC-22Channels Four + TwoSpeaker Connections: Two setsAC Switch YesOptions: RC4 Remote Control, Wood Case, Decoder
Marantz 4230 Receiver Deluxe Upgrade Kit Genuine Parts Restoration
Our Deluxe Kit for Marantz Receivers includes everything you need to electronically restore and upgrade the audio sections of your Marantz. We also sell an ultimate kit for every one of these receivers. This kit uses the exact same high quality parts but does not include parts for the tuning sections or the somewhat optional trimming resistors. This kit is perfect for the budget minded, those who simply don’t use the tuners much, or those new to this work. You may, of course, choose to restore the tuning section at a later date. Our kits use only the highest quality parts from authorized distributors. These kits save you valuable time and headache in sourcing the parts yourself. Having serviced and restored virtually every Marantz receiver in the past, our kits are accurate and vetted. If you can solder and desolder, consider yourself handy in any other way, and are deliberate and thoughtful, you can do this! Any audio gear over 20 years old can benefit from this procedure. Any unit over 30 years old risks failure of other parts without it. Electrolytic Caps drift and fail with time leading to a less detail, transient response, weak bass and mushy overall sound as well as potential failure leading to costly repair. The sonic difference will likely astound you. Customers consistently tell us how much better their unit sounds after a restoration using our kit. A restored unit also greatly increases its value. We can provide more details on this unit if you’d like. Our documentation isn’t top secret. Parts are separated logically by board. ________________________________More Details____________________________ Quality PartsAll signal path caps 4.7uf or lower are replaced by sonically superior film caps, most by WimaAll transistors are made by OnSemiElectrolytic caps are primarily Nichicon. Panasonic, United Chem-Con and other reputable brands are also employedNichicon caps used are primarily from the UPW and UKL linePanasonic caps used are primarily from the FC & FR lineRelays are primarily OmronTrimmer are made by Bourns (ultimate kits)All Parts Are Procured Directly through the Manufacture or via Authorized DistributorsHIghest QualityNo Counterfeit PartsUltimate Kits include the following*Replacement Caps for every electrolytic or tantalum cap in the unit, minus tuner sectionsUnless otherwise noted, this includes any off board capacitors including the Filter and Coupling CapsOff Board caps may be smaller in diameter than the originals, our documentation provide a few easy options for installing theseReplacement Trimmers for critical audio adjustments like bias and dc offset (where applicable in amplifiers and receivers). Other Kit supplier do not include these. Ultimate kits onlyReplacement Relay where applicable*Not all units use a relay, not all vintage relays have a modern replacement, and finally not all vintage relays can be ascertained from available dataKits are priced accordingly, you can view our parts list to see if your kit includes the relay(s).Replacement Transistors and diodes for those we now know were problematic*Not all transistors and diodes are replaced, nor should they be. Our Parts List shows all the transistors and diodes includedMany units made after around 1982 have few or none of these problematic transistorsIncluded Documentation (PDF format)Our Parts List (separated by board and part type – easy to comprehend)The Service Manual (or at least the schematic if we can’t locate the full service manualOur exclusive and extensive Hints & Instructions DocumentThe Owner’s Manual (if available)The Kit Parts are separated and bagged by boardShipped promptly in quality boxesDocumentation links are sent via message, email and included in the kitNeed a Kit for Something Not Yet Listed?Have Questions?Contact us
Marantz 4230 Original AM/FM Tuning Flywheel w/ Hardware
4230 Tuning flywheel with the attaching hardware.
Marantz 4230 Receiver Signal Meter
INCANDESCENT LAMP KIT /4240/RECEIVER/4230/ METER-Marantz/4415 /DIAL BULBS LIGHTS
FLAT RATE SHIPPING COST $4.25 FOR ALL QUANTITIES ! PLUS ++++++ BUY 2 LOTS OR MORE & GET 10% OFF PRICE !! * COMPLETE MARANTZ 4230-4240-4415 LAMP KIT: (9) INCANDESCENT Bi-Pins 6.3V 40mA + (7) Fuse Lamps 8V 200mA + (1) 8V Dial Pointer 3MM Wire Lamp= (17) TOTAL LAMPS * These Bi-Pins & Lamps will work on 4230,4240,4270,2235, 2235B, 2240, 2240B, 2250, 2250B, 2265, 2275, 2285, 2325, 2330 receivers and other Marantz models of the same time period. * These Bi-Pins will replace the Stereo, auxiliary, FM,& AM Lamps. * Each Bi-Pin , Fuse Lamp, & Stereo Lamp is individually TESTED before it is packaged & shipped to you. * These 8V-250mA fuse lamps will fit a Marantz,Fisher,Kenwood,Pioneer,Sansui,Yamaha,Sony & many other vintage receivers that take T-2 style lamps ranging 7-8 volts. * Operating Current: 0.20A ( 200mA) * Life Hours: 10000 Hrs * Lamp Type: Incandescent * Lamp size: 29MM= 1 1/8 inches * PLEASE CHECK YOUR UNIT TO INSURE PROPER FIT PRIOR TO ORDERING FUSE LAMPS !! ( Please see Photos we have provided for you ) * MOST important to me is giving my Customers the BEST PRICE, QUALITY, & PERSONALIZED CUSTOMER SERVICE !! * We GUARANTEE the quality of our product & will gladly issue a replacement or refund within 60 days of purchase if not fully satisfied !! * I welcome customize orders!! Contact me for any SPECIAL requests * Any questions or concerns please contact me BEFORE making any purchase!! ALL ITEMS WILL BE SHIPPED WITHIN 2-4 BUSINESS DAYS !!
Marantz 4230 Receiver Play/Cal or Record Level Small Knob (1)
Marantz 4230 Stereo / Quad Receiver Parting Out Signal Strength / Dolby Meter
Marantz 4230 Stereo 2 + Quadradial 4 Vintage Audio Receiver
Overview: Up for sale is a classic piece of 1970s audio history—the Marantz 4230 Quadraphonic Stereo Receiver. Known for its warm, punchy sound and iconic aesthetic, this unit features the legendary Gyro-Touch tuning wheel and beautiful blue illumination.
Marantz 4230 Stereo / Quad Receiver Headphones Jacks
Marantz 4230 TITANIUM upgrade bulbs lights LED lamps FULL Set kit w INSTRUCTIONS
Please note we also offer a FULL kit with INSTRUCTIONS ———–> LINKOr search for item (eBay item number: 165635763756 ) This is out TITANIUM bulb kit. It includes titanium body bi-pin bulbs. A much superior quality compared to others. As someone who has serviced many various vintage audio equipment for a considerable amount of time, I have developed a deep admiration for good quality gear. However, I have noticed that many of these units suffer from constantly failing incandescent bulbs, resulting in wasted money on services to replace them time and time again. After years of dealing with this issue, I decided to take matters into my own hands and develop an LED replacement that would match the color temperature and angle of the light. Through my research and collaboration with a manufacturer of LED bulbs, I was able to develop a perfect replacement that not only matches the color temperature but also offers a 360-degree lighting angle compared to the 120-degree angle of regular LED bulbs. This LED replacement has the correct voltage and is sure to save users time and money in the long run. I am thrilled with the results of my efforts and confident that this LED replacement will be a game-changer. Say goodbye to constantly replacing incandescent bulbs and hello to the reliable and efficient lighting of LED technology. These are frosted lens bulbs. The frosted lens allows much wider and even light distribution compared to a clear lens. There is no halo effect with the frosted lens. – 8 x Warm white 8v fuse type LED/ – 9 x LED bi-pin 8V Titanium body bulbs. (Much superior in comparison to the original incandescent bulbs. These do not produce any heat, heat that damages internal filters and boards.) – 1 x 8V indicator wired LED bulb. – 1 x 8V bayonet LED bulb. – 1 x 8V bi-pin LED bulb. – STEP by STEP Installation instructions (PDF file presented electronically) FULL kit with INSTRUCTIONS ———–> LINK We also offer a great selection of Restoration Kits, LED conversion kits, Volume Controls, Rotary Switches and other rare/unique parts;Make sure to check our store ———> LINK (Use the search bar inside the shop to find what you need faster)We may also be interested in purchasing your equipment
