Rotary switches, slide or rotary, use DeoxIt D5.
Fader formula for pots (potentiometers) even the type of pot that uses a slider. Think EQ.
If the units basically work, and you think a "tuneup" might be in order. There is a procedure for FM/AM alinement and a separate procedure for seeing bias and offset of the main output amplifier. If you are handy with a meter, you can do the bias and offset part. If this setting is out-of-spec, setting it back to factory specs will improve the sound. Download the service manual from hifiengine and use an insulated screwdriver for the adjustment. Leave the FM alinement to a professional. I send out all my FM jobs to a tech who's sole job is radio alinement. There is way too much specialized test equipment to buy and keep in calibration.

Thanks! I'm glad you have all the work you want to have. The Pioneer was working when I last used it a couple years ago, but I need to rig up some speaker plugs for it. The Kenwood worked when I first got it and then one channel stopped working (on all sources tried, not a tuner issue.) I haven't used it in several years. I will take your good advice on the restorations. Is the fader formula for pots and rotary switches? ;^)

I repair/restore vintage hifi gear up to about 1980, or when they switched to digital tuners and/or surface mount parts. Newer tubes amplifiers are the exception that rule. I repair all the major brands out of Japan and the earlier makes built in the US. McIntosh, Marantz, H.H.Scott, KLH, Soundcraftsman, Bogen, Strongberg...

Both of your receivers are good ones to restore. Before you dive in: are they working? If they are intermittent, try the DeOxit products first. Fader formula for the rotary controls, D5 for the switches. You will be surprised how well this stuff works.
Understand many of the replacement parts are no longer available. Finding substitutes transistors is very time-consuming and not always fruitful.
Educate yourself on the real value of your equipment by checking the (sold only) prices on eBay for refurbed and as-is. Only then can you realistically determine how much you are willing to spend to do a total re-cap. This can get very expensive. Often out-weighing the actual vale of the piece. Call it a labor of love.
I charge $105/hr. And I am swamped with work. I have far more work than I can handle now. I turn a lot of work away, as I am retired (after 50 years) and could be working 8-hour days, 5 days /week. I am getting too old to work full-time.
There are fewer and fewer of us old techs left willing to put in the hours required to properly work on these units. Given they are getting on 50 years old. The circuit boards are fragile, any of the plastic bits have to be handled with great care. The old Dual turntables are on my "will not work on" list for this reason. Same goes for tape transports.
On youtube I see a mid-west shop "Sky Labs". They have four or five techs about my age. They seem like a well-run shop.
That said, I can't offer any recommendations as I have no direct experience with any of them. I can tell you finding a reputable shop is going to take some deep research. The folks that do this type of work are a dying breed, and there is nobody coming up the ranks behind us that I can see.
Best of luck.

Do you specialize in any particular brand or type? Have a website?
I have a couple early '70's receivers that I've thought about refurbing.
https://www.hifiengine.com/manual_lib...
https://www.hifiengine.com/manual_lib...

I do repair and restoration.
For Kits Check out Parts-Express
They have lots of DYI kits speakers & amps both SS and tubes.
Websites Audio Karma & Audio Asylum both have DYI forums for help and advice.
Antique Electric Supply Has all the tubes and tube hardware you could ever need. The guitar amp repairmen's one stop shopping.

More likely. the theft will happen while you least expected it on a bright and sunny day.

I have interest in building tube audio. What is your work with vintage audio?

yup!!

Great comment! This is a news reporter’s approach. It will take a completely different micro grid approach to deal with multiple sources of power. Maybe in 2080.

My new home, humble as it is, is just down the road from a Five Star Hilton hotel with an enormous marina. Our power hardly ever goes out. When it does, it's on in an hour or less. Having rich neighbors has certain advantages.

Thank you for your insight on the inner workings of the grid.
I mostly work with vintage audio electronics. I take the grid for granted, as I'm sure most people do.
I know it's a highly complex system. Balanced on a knifes edge most of the time.

My guess is that those small reactors will be regulated to death. Same thing they did to the larger reactors.

Two new reactors in Georgia are just coming online. They originally were going to have several "siblings" but all the others were cancelled.

Believe it or not, the problem has not been addressed. This comes from the nature of the power they produce and is probably impossible to cost-effectively solve. Solar produces varying amounts of DC. Wind produces varying frequency AC. Both have to be converted into constant frequency AC by using what is called an inverter. Those of you who camp out know all about the ones that convert 12-volt DC to 120-volt AC.

Now, let's see what's involved with using one of these to put power on the grid. We now have to exactly match not just the frequency of the grid but the phase as well. This is rather finicky, so the normal way to do this is to use the grid frequency and phase to drive the inverter. This type of inverter is called a grid-following inverter-based power source or GFL IBPS.

This is not at all like what a normal spinning synchronous generator (SG) does. Those match the grid and frequency, but since they have spinning mass, they also have inertia. This automatically stabilizes the grid because it cannot instantly change its frequency due to that inertia.

So, when you place large numbers of GFL IBPSs (also known as Inverter Based Resources or IBRs)on the grid, you get grid instability and that's not just theoretical:

"There are several system disturbances in the recent past where significant amounts of IBRs and other resources were lost (“tripped” or went into momentary cessation) when the IBR performance was undesirable for common system events (faults and switching). These include, but are not limited to the following:
✔ Blue Cut Fire disturbance (2016)
✔ Canyon 2 Fire disturbance (2018)
✔ Palmdale Roost and Angeles Forest disturbances(2019)
✔ San Fernando disturbance (2020)
✔ Odessa disturbances (2021)
✔ California 2021 disturbances (2021)
• Victorville, 24 June 2021
• Tumbleweed, 4 July 2021
• Windhub, 28 June 2021
• Lytle Creek Fire, 25 August 2021
✔ Texas Panhandle Wind Event (2022)
✔ Odessa II Disturbance (2022) (NERC Category 3 event—loss of >2,000 MW of resources). [ behind paywall https://ieeexplore.ieee.org/document/... ]"

From an article titled "Grid-Forming Inverters:

"Unlike synchronous machines that act as a source of system strength, GFL IBPSs do not contribute to system strength but, rather, have the overall effect of reducing it. [ behind paywall https://ieeexplore.ieee.Org/stamp/sta...]"

This article discusses a theoretical solution, Grid-Forming inverters. However, none have been built because the theory behind them isn't yet complete.

Our neighborhood in the boonies has relatively new infrastructure, but has had storm falling branch
issues because our supply was routed a long way until recently. Now our supply route is the same
as the state prison about 3 miles away and we haven't had an outage since that change. ;^)
I think the power is mostly nuclear source generated.

EV's are rich people toys for local driving. Think: big golf cart with doors and a trunk. EV's are not ready for prime time for a number of reasons. If we solve the global energy problem (and that's a huge if) wires can be set into the road for inductive pickup so the vehicle can be charged as you drive on the interstate or other state roads (should that state have the resources to do so). Then any jaunt on a "B" road (provided you don't go too far astray) should be doable.
That aside: (SMR) Small Modular Reactors. might be a solution for the energy shortfall we are certainly going to face in the very near future. But even this is fraught with problems: Where do we source our uranium? Russia? Niger? Both of whom has the US on their shitlist. Then there is the disposal problem. We could follow France's lead and build breeder reactors, but this country seems too pig-headed to follow another countries good ideas. So we just bury our problems in deep caves in Utah and Nevada.

Thanks

As far as I know, like most batteries, they are treated as hazardous waste. That said, when the batteries start to fail, my understanding is that if you go back to the dealer they will let you trade them in for a new battery pack. Tesla does "rebuild" the packs by testing each "cell" replacing the weak ones. What do they do with the "bad" ones? Who knows. Great question.

Thanks for that. But the United States is still in a death spiral

An infrastructure that is little changed from the day Nikola Tesla set it up 125 years ago. I lived in an old Massachusetts mill village. The power came from the mill. They were some of the first people to have electricity delivered to their homes. The street wires are the original wires. When I moved there some 45-50 years ago the last of the rubber coated cloth insulation was just falling off. From then on, every time a branch hit the top wire on the pole it would arc-out and trip the central disconnect until Mass Electric pulled the branch off and re-set the switch. Our houses all came with Knob & Tube wiring, four 15 amp circuits (60 amps) with screw-in fuses. Most people eventually up-graded their service to 100 or 200 amp service with circuit breakers. Then came the huge job of up grading the internal wiring, room by room.
Point is, if you live in any area that has been around a couple of hundred years, most of your infrastructure is ancient. I mean horse and buggy era ancient.
This push for all things electric has to boomerang. Places like California their grid is already breaking down, and they have far newer infrastructure then we here on the east coast.
Second, the power is centralized. When the grid goes down, we all go down.
I have read about these very small scale nuclear power generators that have recently got federal approval. These are so small, they range from single family home size, to neighborhood size. If that is the new technology we could be looking at a whole new ball game (except for that nagging uranium supply issue).

Indeed, the absurdity is of the proposed government policies that the article describes.

I can only assume we are discussing this is to demonstrating the ABSOLUTE absurdity of this article

But comrade, it's your duty to the "homeland." [/s]

Even if the synchronization issue is satisfactorily addressed, (presumably the solar panel folks have this issue somewhat addressed) there is the cost of the battery itself. Given that all batteries have a finite charge/discharge cycle life-time. Every cycle is one less cycle you get to use driving. Who pays for the shortened battery life? Will the service provider rent your spare capacity? Doubtful. The grid gets free use of your $50K battery pack? Ummm. No.

Exactly. 👍
And you, the EV owner, can just take public transport to work.
Your boss will understand why you're late because he will be late for the same reason.
Productivity be damned; 'profits' are irrelevant, comrade. Heil!

Apparently the plan is to use it for "peaking" power.
If the grid has excess capacity, you can charge your car.

If the grid cannot produce enough power (it's cloudy or the wind isn't blowing) it will pull power FROM the car's battery to provide support for the grid (V2G). Or to run your house instead of pulling power from the grid (V2H).