Voltaic Vintage Repair & Restore

Ready to wash the Sansui Eight.

Pre restoration pics of the bottom of the Sansui Eight.

One more of the Sansui Seven.

Finishing up this Sansui Seven. New electrolytics, relay, 2SA640's to KSA992's, adjustment pots to 25 turn bourns. Clean and polish front face.

Pre-restoration pics of a Sansui Eight. This one has the protection relay, so that will get replaced as well.

My current listening setup. Marantz 4140 Int Amp, stacked Advents, Marantz 6350Q Turntable, Sony TC-K71 cassette deck.

On units with capacitively coupled outputs, I've been using 10 ohm 5W resistors on un-used speaker outputs. Switch to that output before power on/off. The resistor takes the "pop" the speakers normally take during the cap charge up to the mid-voltage. A coiple of examples: Sansui 5000A and Marantz 1060.

A Sansui 890 had an intermittent dial lamp. Found a cracked solder joint. Re-soldered and better than new!

Need to replace the relay from a Kenwood KA-7100 Integrated amp. I think a lot of this is preventable by turning the volume down at power on/off.

I tried cleaning/polishing the bottom contact, but the plated gold is gone.

Magnavox amp tube glow.

Realistic STA-2270 switched out the speaker terminals with pomona mini 5-way binding posts. This was the very first receiver I purchased back in 1986.

New poly caps to replace electrolytics for Marantz HD660 speakers. Leaving the two mylars be.

Ready for some pick-ups after repair!

Just finished these Cerwin Vega V-32 speakers. Needed four new tweeter diaphragms, back panel repair and new 5-way binding posts. These are some rockers!!!

Joel Tomesh (@voltaic_vintage) • Instagram photos and videos

Check out my Instagram for more pictures of projects.

Joel Tomesh (@voltaic_vintage) • Instagram photos and videos 597 Followers, 661 Following, 178 Posts - See Instagram photos and videos from Joel Tomesh ()

Finished the Marantz 5220 deck. Cleaned everything, new belts, l**e and verified all ops. New machined k**b, polished all clear plastics, polished all k**bs and face, de-oxit etc... Nice looking deck!

Working on a Marantz 5220 cassette deck. It's missing a function k**b. These are a slighty smaller size and must be rare because I can't find one.

Luckily the black insert is still there, so, I machined a new aluminum slip cover/k**b. I think it turned out pretty darn good.

Another QX-949 shot with all the replaced components.

Just finished this Magnavox console amp using the David C. Gillespie design. Such a warm and clean sound from this low power amp.

Finished up the QX-949 restoration. It's a beut!

Finished the Marantz restoration with a beautiful wood case from https://vintagehifiaudio.com/

Pioneer QX-949: In the middle of re-capping the Sub-Channel (CD-4) board. Lots of caps and transistors to replace on this one!

Replacing the main supply caps on the QX-949. Yesterday it was washed and dried. Everything is clean which makes it nicer to work on.

Sony TC-K71 bad 5V supply and shorted tantalum cap in the bias oscillator. Repaired and working wonderfully again.

Full restoration on a Kenwood KR-7400. Wash dry inside & out, all electrolytics replaced, new relay, power supply mod, unreliable transistors replaced, new power switch cover, de-oxit/faderl**e pots/inputs/outputs, new warm white LEDs, repaired led needle indicator, clean polish face and k**bs, polished out scratches on front plastic display.

Finished with the clean up, adjustment and evaluation of a Kenwood KT-7500 tuner and KA-7100 integrated amp. Really some beautiful silver faced pieces.

This is not stereo vision!

Working on two Philips turntables. A 212 and 312. New powers switches and -9V pass regulator. Cleaning and adjustments.

Re-stuffing main filter caps.

Full restoration complete. Marantz 4140 Stereo 2-Quadradial 4 amplifier. Wash & dry, light blue LED's, new power switch & snubber, full re-cap, re-stuff main filter caps, new relay, new bourns multi-turn trimmers, polished front display. Looking and sounding great!!

All ready for a thorough cleaning!

New acquisition. Marantz 4140 Quad Integrated. Testing some new LED's before it gets all cleaned and refurbished. Left meter is light blue. 2nd from left is warm white. Next two are original lamps. Beautiful looking piece!

Washed and dried entire unit. Replaced volume pot. Replaced power switch. Replaced power switch silver button. Replaced dial and meter vellum paper. Cleaned/polished silver face and k**bs. Painted new black lines on k**bs. Glued dial glass to silver face. Replaced dial and meter lamps with warm white LED. Replaced indicator and stereo lamps with 6.3V/0.4A lamps. Replaced dial pointer lamp with 8V/4.7mm lamp. Re-stuffed main filter caps with 12,000uf/63VDC capacitors. Replaced all electrolytic capacitors with UPW,UKL,MKS2 versions. Replaced 2SC1000, 2SC458, transistors on phono and tone amplifiers. Replaced offset and bias pots on main output PCB’s. Replaced thermal grease on output transistors. Applied de-oxit and faderl**e to all pots. Applied de-oxit D5 & Gold to all in/out connectors. Adjusted L501 to center tuning meter. Adjusted offset and bias of output amplifiers. Adjusted phono amplifier offsets. Tested all operations. Ran for 8 hour burn-in. Looking and sounding great!

Pioneer CS-88 crossover recap.

Bob Carver Crimson 265 working again. Bad cap in the bias circuit that caused a lot of current to flow through the bad resistor. Replaced the resistor and the cap with a poly-film.

Marantz 2245 ready for a wash and dry.

Working on a Sunfire 600. All the solder joints were clipped into the solder, bending the leads into the ground plane. 2nd pic shows where an arc occurred and fused the ground plane away.

Repaired Pioneer SX-1500T. Had a shorted output transistor, scratchy pots, burnt out lamps and intermittent switches. Replace both left output transistors, new lamps and some de-oxit. Good to go.

Bang & Olufsen Beogram 4002 turntable ready for delivery. Tonearm did not work because of old frozen grease. Cleaned, re-l**ed, belts, lamps and speed adjustments made. Also a new cap in the output relay circuit to get it working again. DIN to RCA adapter.