Recent content by mlucitt

The machine I used had a primary preheat of 350F and a secondary preheat of 480F. Total preheat tunnel length was 4.2 meters. The solder bath soldering temperature standard typically falls in the range of 240°C (464°F) to 260°C (500°F) with a max of 280C (536°F). The wave was a bit more than...

Manley Labs makes and sells these RCA Jacks for $7.00 each. This other company must have bought a bunch and now wants to liquidate them, no issue there. Manley Labs makes the highest-rated Studio Recording equipment in the world, so cool your jets, Perry. Manley Labs RCA Jacks are made...

Eric is right, just cut R1, C8, and R2, C9 off the DCP Board. And thanks to Dr. Otto J. Zobel of Bell Telephone/Bell Labs for inventing and patenting an "image impedance" filter network that reduced voltage from reflecting off the woofers and back into the amplifier in about 1920.

Tim consider that in a production environment the circuit boards are run through a solder bath with molten solder flowing under the boards like water. Likely 600-700 degrees and the solder bath could be 24-36 inches long with a conveyor speed of 4-6 inches per second. In other words proper flow...

Don't waste your money on RCA Jacks. Just get these Manley Labs Jacks for your WOPLs and the WOA Model ONE: https://www.lunavellegrove.com/product-p-811293.html If that price ($1.99) is still good, it is a steal.

I should have said the KT120 tubes run at 650 VDC in Pentode mode (above). Sorry, brain is faster than fingers...

Thanks Ed, exactly what I was looking for. Mark

I would leave it as a museum piece...

To divest yourself from all things Google, simply smash your phone, disconnect your computer from the Internet, and in severe cases; go off grid.

Yes, the EL34 tubes are generally run with lower plate voltage in the range of 350-500 VDC. Optimum is 430 VDC. The KT120 tubes run at 650 VDC in Tetrode mode and 850 VDC in Tetrode mode. This could explain the difference in bass response, but all amplifiers are different.

I always count three seconds after the solder flows. It is usually enough. Sometimes you can see the solder flow down into the hole and then just stop, that is your signal to remove the heat. Don't move the wire for several more seconds.

My Phase Linear 5000 does everything I need an FM tuner to do. I use a simple dipole antenna made from twin-lead wire and taped to the window facing West. I swapped out the two original RC4136OPAMPS with (2) Brown Dog 060601 Adapters with (2) OPA 2134 SMT OPAMPS mounted. It sounds very good to...

Frampton Comes Alive (Live) "Do You Feel Like I Do" first released 50 years ago today. Geez we are old...

Good catch!

And if a fuse was the only casualty, you are a lucky man.