Responses from yogiboy

Your One Bullet Point Solution; Electrical Upgrade
Since you are upgrading your service it makes no sense not to go with a 200 AMP panel. If you want you can still keep your sub panel! 
How to connect multiple sets of speakers?
Here ya go!! https://geoffthegreygeek.com/ufaqs/whats-difference-speakers-series-parallel/  
Are tubes really “warm”?
Here ya go!! https://www.collectorsweekly.com/articles/could-an-old-school-tube-amp-make-the-music-you-love-sound-better/  
Best debut album
Dire Straits   
Rogue Audio Sphinx V3
All of the Sphinx models always had a solid state phono and tube line stage! 
Correct Input Sensitivity Setting for Cartridge
The output of that cartridge is a high 6.8 to 7.2 mv. Try all three settings on the Sherwood and see which sounds best! 
How to contact Audiogon Support
If your posting is suspended, how did you post this question? 
Best roof antenna for vintage tube fm tuner
For good clean FM reception you need a directional yagi type. A TV antenna is not the best choice so you will need 2 antennas. They stopped making FM only antennas years ago. This Stellar labs is the only one that I could find ! https://www.newark... 
Raising my subwoofer
Get a cinder block and paint it black!! https://www.hunker.com/12003114/what-are-the-dimensions-of-a-cinder-block 
Jelco tonearms closes
Cheap starter system for kids
This Pioneer PLX-500 comes with a built in phono preamp and cartridge!https://www.bhphotovideo.com/c/product/1345767-REG/pioneer_plx_500_k_direct_drive.html/overview 
Speaker cable arrows???
Here ya go!https://www.psaudio.com/askpaul/why-do-cables-have-direction/ 
Thorens TD 166 hum
Why is that a bad idea? This is from the Shure website!!If hum increases when a human hand is brought near the phono cartridge headshell, it is likely that the metal shield in the cartridge is not being grounded by the connections. If a plastic he... 
Preamp suggestion for Quicksilver M120 amps
I doubt very much that will improve it. It’s just not your cup of tea. See if you can return it! 
Thorens TD 166 hum
It might be the ground tag on the Shure. Remove it and see if that solves the hum problem!!https://service.shure.com/s/article/how-to-remove-grounding-tab-on-a-shure-phono-cartridge?language=...