LED board meter sensitivity switch

[wattsabundant]

Who has used an analog meter sensitivity selector switch in conjunction with the W/O LED board on a 400? Toggle or rotary?

 

[laatsch55]

Dpdt toggle, mini..

 

[wattsabundant]

Anybody have a photo? Front panel is mint and I'm not liking the idea of drilling it.

 

[Gepetto]

Anybody have a photo? Front panel is mint and I'm not liking the idea of drilling it.

 

[wattsabundant]

View attachment 82377

Hm. Threaded into the panel?

 

[Gepetto]

Hm. Threaded into the panel?

Absolutely

 

[NavLinear]

Who has used an analog meter sensitivity selector switch in conjunction with the W/O LED board on a 400? Toggle or rotary?

See post #31.

https://forums.phxaudiotape.com/threads/400-series-1-build.11153/page-2

 

[wattsabundant]

What drill size and tap? Must be a metric size as none of the dies I have work.

 

[Hexis22]

Additional pictures showing meter sensitivity switch on a 400 chassis. This is the White Oak chassis with hole cut as delivered and I currently do not have a bare chassis to measure hole diameter.

 

[Hexis22]

I can say the switch measures 5.75mm and a 6mm hole would work for mounting this switch (Eswitch-100DP3 T1B1M1 QEH).

 

[Gepetto]

What drill size and tap? Must be a metric size as none of the dies I have work.

Not metric Don, I recall it is UNEF thread on the switches.

0.228” diameter hole to be tapped through with ¼-32 UNEF thread

 

[J!m]

Probably on McMaster.

 

[Gepetto]

I can say the switch measures 5.75mm and a 6mm hole would work for mounting this switch (Eswitch-100DP3 T1B1M1 QEH).

The chassis hole size is 1/4"

 

[WOPL Sniffer]

I used a stock 700 II switch.

 

[wattsabundant]

Not metric Don, I recall it is UNEF thread on the switches.

0.228” diameter hole to be tapped through with ¼-32 UNEF thread

.228 looks to be a #1 drill.

 

[Gepetto]

.228 looks to be a #1 drill.

true