New product alert

[M Fowler]

I like checking out new amp building products that come out.

One new item that CEDist/AES listed as a new product is the round hole speaker impedance switch.

I ordered some so we'll see how I like them compared to $10 3P switch I normally use and either include the 4/8/16 ohm indicators on a panel or label maker or mojotone round panel they sell.

Mark

p-h1701_main1.png

p-h1701_31.png

p-h1701_specifications_t.pdf

[sluckey]

Interesting switch. I'm curious about the chassis hole size? Please let us know. Lifetime 300 operating cycles seems kinda short, but maybe not.

[R.G.]

What is the current rating?

[martin manning]

What prevents it from rotating? D-shaped mounting hole? I agree 300 cycles seems like limited life... six years if you switch it once per week.

[pompeiisneaks]

It's plastic, I'm guessing they don't expect you to be switching impedances tons. In most cases, the life of a specific amp is set for a cab until sold to someone else who may have a different cab, and switches again. I do agree it's not a long lifespan, but likely due to the cost being lower than the nicer clunking metal ones.

~Phil

[R.G.]

Maybe the thing to do is to buy one for use and one or two more for spares.

[Rockwell666]

Bogner uses these switches. Mouser carries them, I had ordered one a few years back. Schurter 0033.4032 hidden under voltage selector switches.

[M Fowler]

What prevents it from rotating? D-shaped mounting hole? I agree 300 cycles seems like limited life... six years if you switch it once per week.

I could be wrong but on page 2 of the diagram, doesn't it show a notch on the bottom?

Not sure if the hole is 22mm or 20.3mm

[V2]

It looks like the diameter is 20.3; the notch adds ~2 mm.

Does anyone have a bit or punch for 20.3 mm?

[pompeiisneaks]

looks like almost exactly .8 inches another random size.

~Phil

[R.G.]

looks like almost exactly .8 inches another random size.

Of course, everyone who drills holes in a chassis for mounting a switch, jack, etc. has a T-handle reamer to enlarge holes.
https://www.amazon.com/s/?ie=UTF8&keywo ... zxn9_e_p38

[pompeiisneaks]

oh my, you're my hero, my stepper bit is often a royal PITA, I do have some punches that fit standard holes for my larger stuff like sockets and cap cans, but that thing looks outanding, I'll have to get me one.

~Phil

[M Fowler]

I solved all my hole size problem by ordering metric step bits and don't use my reamer.

[Leo_Gnardo]

looks like almost exactly .8 inches another random size.

~Phil

Looks about 13/16 inch. Might be able to find a hole punch. I like M Fowler's big metric step drill idea too. It's hell to open up a hole with a Dremel grinder, done way too many octal socket holes that way, also the large rotary impedance switches. Add an hour to the job and a lot of hand pain. For those lucky enough to have a big drill press or milling machine, good on yez!

[M Fowler]

Received my new switches.

The outer ring is 24.55mm

There is a small bump on threaded part for locking this into place. I measure this to be 22.23mm
The threaded part is 19.80mm or 0.7805 inch so drill the hole that size and file a V notch on the opposite side of the 8 ohm indicator.

I measured this using a cheap Pittsburgh digital caliper.

I have not drilled hole or installed this impedance switch yet.

Mark