Connect a pair of cheap speakers for testing just in case....
Hooking up my phase linear model 2000 preamp, to my model 400 main amp.
I had these two units for years,hooked them up back in 2001,found they needed some work, had them repaired they have sat in the shipping box ever since. I did hook then up years ago but don't remember how I did it. Now I have them again, and want to get them going . And don't want to burn something up hooking them up wrong. Can someone give me some direction how to do this. Thanks DRW.
Showing 7 responses by imhififan
Some user install speaker protection module in
model 400
to protect their speakers http://www.ebay.com/itm/UPC1237-Dual-Channel-Speaker-Protection-Circuit-Board-Boot-Mute-Delay-DC-12-... |
Any suggestions on how I can do this, without the VariacIf you DIY, a 100W incandescent light bulb will work well in this case: https://www.radiomuseum.org/forum/current_limiting_with_a_dim_bulb_tester.html If you aren't experienced with wiring, or those diagram looks confusing, get assistance from someone more experienced. I did look at that speaker protection module on ebay, there are a few, what size would I need. What would be the best choice? I have never even seen any of of these, I will get whatever one needed to protect my speakers whatever the cost. How does it get hooked up, just hook it up in line from the amp to the speakers like you would a fuse.In the picture of the link show the connections, you also need a 12vdc adapter to power the module. http://www.ebay.com/itm/UPC1237-Dual-Channel-Speaker-Protection-Circuit-Board-Boot-Mute-Delay-DC-12-... |
Is this the one that I should get?Yes, or bigger relays but not smaller And this light bulb tester will work to charge the capacitors, so I should not need to buy a Variac for this one time use?Yes, you can start with a 15w incandescent light bulb for about 12-24 hrs, then use a 40w bulb for another 12-24 hrs to reform the capacitors, then follow by a 100w bulb for an hour to make sure the amplifier still working fine. |
So will 1.0 amp or 1.5 amp be to big.Either is fine to supply power to the protection module. I should not have to do this for the preamp, correct?I recommend using the bulb tester to power up the preamp too, just use a 25W light bulb for an hour. BTW, connect a pair of cheap speakers for testing before you install the protection module. |