A buzz in both channels

[Paul Birkeland]

I don't immediately see the difference between the G and the non-G, so I wouldn't sweat that.  Yes, that is an appropriate replacement for the regulator.

[Skipperrik]

Okay.

I just wanted to say again that I appreciate your help and your patience. I'm sure it can be frustrating to deal with newbies and I'm a great example of that. Thanks!

[Skipperrik]

I'm happy to report that the new parts are installed and the voltages are all within spec. The hum is still present however. I noticed that it isn't present when I turn the amp on, only after the circuits kick in. Also, immediately after switching it off the sound gets significantly louder until it fades away. Could this help in locating the cause?

[Paul Birkeland]

I'd be poking around with a wooden chopstick to see if you can disturb whatever connection is causing the problem, then you'll know where to focus your resoldering efforts.  A cheap-o pair of headphones plugged into the amp is a good idea for this kind of testing, as it can produce loud noises if the poked joint is particularly loose.

[Happy Ghost]

The hum is still present however. I noticed that it isn't present when I turn the amp on, only after the circuits kick in.

I had a similar problem in C2A..in my case, there is a noticeable hum/distortion in both channels..  But turns out to be a problem with the selector switch in the C2A.. I need to push it hard to the current selection and then the static disappears.. I am suspecting a loose wire or a bad solder joint ...you *might* be having a similar issue perhaps. worth a shot..

[Skipperrik]

Thanks for offering the suggestion, Happy Ghost. I have a DAC that has a volume control and I only use one input so I bypassed the selector, balance and volume controls. So far, poking and proding hasn't helped to locate the problem. I"m still searching.

[Skipperrik]

Hi Paul. I believe I've narrowed the problem down to the headphone jack and would like to get a replacement.

Awhile back I sent an email to Bottlehead asking if longer lengths of your power cord could be ordered. I got no response. Last week I sent an email asking for someone to call me so I could order parts. I haven't gotten a response.

Do you guys sell parts other than what's listed on your parts page?

[Paul Birkeland]

A tree fell on Doc B's house and they have been a bit occupied at the moment but should be getting back to the office shortly.

[Skipperrik]

I’m sorry to hear that. I hope there wasn’t a lot of damage.

I ordered a new locking jack so hopefully that will solve the problem.

[Doc B.]

Yes, we have had quite a ride the past few days getting power back to our house. After a couple of false starts it looks like we have it fixed just in time for tonight's snowfall. I am back at the office for a short time today to get through as much correspondence as I can.

I'm afraid we only offer the power cord in the 6 foot length. The gauge of the wire used puts some limitation on the current capacity and we feel that a longer run might possibly degrade the performance.

Re parts - we only sell replacement parts for our customers who may need them. If you have broken or lost a part we can help you out. Best way to handle this is an email to [email protected]

[Skipperrik]

Thanks for chiming in, Doc. I'm sorry you have experienced the wrath of nature. My heart goes out to you!

I've been having an ongoing problem with wires breaking in my Crackatwoa. Apparently the wire stripper I used put a ding in them and over time and movement from tracking down a ground loop hum, it causes them to break. I'd like to order more wire so at your convenience, please have someone give me a call so I can give you a credit card number.

Thanks again and I hope things smooth out for you!

[Skipperrik]

I've been over every solder joint in the amp and checked each wire's continuity and haven't found the source of the hum. This morning I noticed a burned spot on one of the 270Ω wirewound resistors. Could this be the cause, and what would cause it to burn like this?

[Paul Birkeland]

See page 39 in the manual, those are not properly installed.

[Thermioniclife]

PB beats me to the punch once again!