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SE84C-EX Hum (Read 11260 times)
Joel
Ex Member



Re: SE84C-EX Hum
Reply #45 - 05/19/05 at 01:53:20
 
I posted some thoughts on the Hornfest and amp comparisons on Ed's site. One of the things I mentiioned was that my CEX has absolutely no hum. Now there are several other members that can verify that. It is one great sounding amp. It just keeps improving.
Joel
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needlz
Ex Member



Re: SE84C-EX Hum
Reply #46 - 05/19/05 at 04:23:23
 
I have a C-EX too and it is pretty much hum free. I recently added front jacks and wired them directly to the input tube. Since I did that I am getting the weird hum problems that others have described... The amp hums even when it's off. It will continue to hum until I disconnect the rca's  from the front jacks AND remove the power cord. If either of these remain connected, the hum continues.
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proud_indian
Ex Member



Re: SE84C-EX Hum
Reply #47 - 05/19/05 at 05:04:45
 
[quote author=Joel  link=1105725338/45#45 date=1116464000]. It is one great sounding amp. It just keeps improving.
Joel [/quote]

How long have you had it since it was EX'ed, and how many hours have you put in for burn in and post burn in. Just my curiosity.
Thanks
shreekant
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Joel
Ex Member



Re: SE84C-EX Hum
Reply #48 - 05/19/05 at 13:07:37
 
I purchased the amp new with the EX option, at the same time I purchased the CSP for gain with rock; both end of year after Decfest. Really only needed the CSP with bias in low position and high volume. I switch between the CEX and an F1, using the CSP as the Pre for both. I usually play either for about 1- 2 weeks, they stay on continuously during that time, that makes a big difference. The CSP stays on all the time. In other words, the amp has lots of time, but there was no hum from the beginning.
Joel
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proud_indian
Ex Member



Re: SE84C-EX Hum
Reply #49 - 05/19/05 at 15:41:20
 
Yes. Keeping them on all the time make a difference. I do that during the weekends, starting Friday morning. Otherwise I find that it takes about 90 to 120 mts to really start doing its thing.
Thanks,
shreekant
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Jason_S
Ex Member



Re: SE84C-EX Hum
Reply #50 - 02/16/06 at 19:10:06
 
Bump

what seems to be the average hum levels of everyones EX modded amps?  I think mine's running about 4.5mv with the input tube in and 3.4mv with it out.    

That seems to be a bit excessive given the decriptions here.

Jason
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Sam in USA
Ex Member



Re: SE84C-EX Hum
Reply #51 - 02/16/06 at 19:33:16
 
Well, the stock C/CS should have a hum <=2.0mV I think
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