Flipping record causing series of loud pops

You left the volume UP flipping records?

You say you swap, you have a switch or have to swap leads?

Make sure the ground and the leads are tight and plugged in all the way.

It's new? After it's warmed up tap the valves with a pencil. Make sure the volume is down. Up to two weeks to find out if transportation caused valve damage. It's just the cost of transporting valves via shipping..
Pull and reseat the valves..

If the timing of the "Pops" is random something is loose. Is something being shaken when the pops occur? Are you moving the tonearm?

Little more feedback about what you are doing..

Regards

Yup, volume DOWN. I always do, she set's at ZERO while I tinker.

No foul no harm...or  NO POPs either. Static discharge? Wow.. must be VARY dry with synthetic apparel and rugs. ADD a little moisture to the air.

Use a ground strap or touch a ground pad.. The ground lug on you phono stage or preamp will work just fine too.

Regards

You can always tell the Rookies. You MUTE or Volume down. You know like it says in ANY older and a lot of new manuals. Try lifting a phono low MC cart with a 30-1 SUT and all valves. You’ll go broke replacing tweeters to woofers and usually the phono stage takes the brunt of the improper procedure.

Folks just because you don’t practice GOOD TT 101 rules you get the big "Stand in the corner and learn" with a pointed hat..

It’s obvious you NEVER used just valves.

If every piece of gear is point to point using valves and you don’t volume down. You will blow something up.. plane and simple. ANYONE that says different is just to young to remember or never used a TT in the 50s on up.. 1959 for me. that’s when my DADDY taught me the fine art of dropping the ol tonearm.. BTW.. Volume was ALWAYS turned down on the first Marantz console with JBL RANGER METREGON C45s.

Don’t volume down.. Pure rookies.. Same people don’t use their turn signals when they drive AND ride (not drive) bicycles.. To lazy and defiant to learn, the RIGHT way..

It’s an easy fix OP.. Volume down and that alone usually discharges you enough to do a record flip.. 63 years of flippin’ vinyl for me, share 78 or 16 rpm stories any time..

Anyway OP easy peasy fix... I just got my new Decware ZP3 I’m watching it just set there and glow. LOW NOISE. 29 db.. just turned it on 20 min ago... I’ll leave it on a week or so.. Then maybe some tinkering..

New valve units with new valves, NOT going in my system until I make sure there are NO valve failures. I know you rookies don’t do that either..
You’re so smart. Now you know the trick to not replacing 2K in tweeters every time you add a new piece of gear. POP my foot. BANG!! and smoke comes rolling out... Don’t volume down..

And start using your turn signals, too busy playing with your Iphone while your herding your cars around (not driving). Puttin' on makeup drivin'. :-)

Dumb (not young) whipper snappers.. Quick to talk, AND SLOW to listen and learn, heaven forbid..... I’ll talk slower next time...

Regards to the OP he/she is trying to learn why and HOW to fix and issue. Not learn, the WRONG way of using equipment..

I don’t get pops either. Analog volume controls require movement to stay clean. A C20 is the last true off on volume pot.. No movement it WILL get noisy. The mute buttons on Macs will last 75 years if they last a minute, same with a volume pot.. If you don’t use them.. 10-15 years before you have clean them correctly, for another 10 years of use.

After a couple hundred TT repairs and builds.. I’ve seen a few weird things.. Always volume down. My newer C2500 does it automatically. It mutes then ramps up the volume (slowly) to the last volume set.. You can actually set that ramp up speed too. I wonder WHY?

It’s in the manual look it up.. Geez.. Who want’s to test the "It hasn’t happened to me yet", guys suggestion.. Mine doesn’t pop either, HIS DOES... This is the fix.

Go argue with GOD, I’m just the mechanic.. :-) I don’t care if you're too LAZY to turn a nob.. Like I said, I BET money you don't use your turn signals.. I BET..

HE'S asking for help, not, "I don't need any, mine doesn't pop".. Good for you..

Just one POP away from the tweeters you probably can’t hear anyways, so WTF, ay? Silly advise from silly people..

Regards

No one is BULLYING the OP. If you read the GD post its the addition of commits like "You don't need to volume down" "I've never done it", " I have owned tube phono stages for decades an have never had any pops.". 

The OP ask why, and I offered a solution in leu of an actual fix. 

So MR musicfan and Mr ghdprentice, READ the whole thread before you offer your opinion on folks you know ZERO about.. Like ME or anyone else around here. Keep your NAME callin' about ME to yourself.. pretty simple.

BOTH you HEROS need to learn some "I'm the new guy manners".
I'll be your huckleberry, Ringo!! Mouth got the best of him too. He should have been listening too.. Just like you should have read the WHOLE thread before running to someone rescue. ROOKIES... there was no fire, only smoke and YOUR at the wrong house with your FIRE HOSE OUT...

Semi Regard, that's a 6 out of a 10 on the regard scale... Silly people

I’m glad you checked and fixed it.. Micro Arcing. The valve unit has all kind of little antenna inside the case picking up the micro arcing in the ground circuit.

Pretty easy to see how it could get noisy. I imaging it didn’t help with floor noise either. I suspect the ground on the SS was lifted and or a different grounding setup than the Valve unit..

I been tinkering with a secondary parallel RJ45 central grounding system. I thought what the heck, how easy could it be, a lot less expensive setup than someone else’s 2-20k system and RJ45 patch cable is very inexpensive and QUIET.. Easy to make up. I gutted a brand new older 100mb hub for the main ground collection point.. Super tight fitting RJ45 females terminals and a heavy gage sheet metal case

A work in progress but sure is working out.. I have 35-40 dollars in it..
Now an EARTH box ground? LOL I’m not buying into that one just yet..
BUT you never know.. Have to consult with Master M and get a little lateral advise :-) He's always tinkering..

Regards..