Collection of mods for Beresford TC-7520

[Shanedudddy2]

Seems the audio quality at work through using 7520 to power my headphones sounds considerably worse than at home.
I assume its a power issue, since I work in middle of town in business district, before this I thought power conditioning was total bs :S
Has anyone had any success with battery mods? Or anyway to get it to adapt it to make use of a battery system?
Im up for a bit of a challenge :P
ta

[DaveK]

Seems the audio quality at work through using 7520 to power my headphones sounds considerably worse than at home.
I assume its a power issue, since I work in middle of town in business district, before this I thought power conditioning was total bs :S
Has anyone had any success with battery mods? Or anyway to get it to adapt it to make use of a battery system?
Im up for a bit of a challenge :P
ta

Hi Shane,
I coupled mine upo temporarily to a small totally enclosed lead acid 12v battery 'liberated' from my burglar alarm system when it was last serviced (over 15 years old but giving a charge across the terminals of 13.4v but 12.4v at the 7520) and I could not determine any deterioration in sound quality, so I went back to the supplied PSU. If it helps, from Stan, the plug/jack is 1.3mm diam and centre positive.
Cheers,

[HighFidelityGuy]

I believe Mr Beresford tried out battery power but found it didn't offer any benefits and caused more technical difficulties than were worth the effort. I'd suggest trying a budget mains conditioner like THIS and seeing if that made any difference.

[Covenant]

Yep I tried a battery and didnt think it made any difference

[DaveK]

I believe Mr Beresford tried out battery power but found it didn't offer any benefits and caused more technical difficulties than were worth the effort. I'd suggest trying a budget mains conditioner like THIS and seeing if that made any difference.

Yep, I got one of these as a trial - I didn't think I had a problem with the mains but went on Alex_UK's recommendation - and I found it did improve things. This ain't gonna make much sense perhaps but the silence was silenter and the 'noises' were clearer- not a night and day improvement but noticeable nontheless.
For the asking price, £26 new or £20 S/H, it's worth a gamble IMHO.
Cheers,

[HighFidelityGuy]

I've got one too and I found it lowers the noise floor a little. Like you say, not a massive improvement but worth the money. On the down side I found it seemed to reduce the dynamics when used with my power amps, so I now just use it on low power kit like DAC, Blu-Ray etc. That seems to give a good compromise. It proved to me that mains conditioning can give benefits and has made me want to try more advanced products that claim to be more effective and have less of an impact on dynamics.

[Alex_UK]

As DaveK has mentioned, I was a complete non-believer, but tried the Tacima nonetheless (after reading an article in one of the mags - worth a gamble for the cost of a few CDs) As DaveK says, not night and day stuff (I didn't perceive I had a problem anyway) but the difference was noticeable (and being honest, sometimes I struggle to notice big changes in systems!) - I would definitely try one first, before modding to battery power - you might be surprised... if not, you'll get back most of what it cost 2nd hand. (I'd give you £20 for it, would use it in my AV system...) How about that - your upgrade is even underwritten!

[Codifus]

What is the value of the original MLC5 and MLC6 caps? Mine are clipped on one end. Could I just add a 36K resistor in series?

[Shanedudddy2]

Think i`ll give it a go and see how it works with the mains conditioning, no harm i suppose if all else fails i got a surge protection extension lead right lol =P

[leo]

What is the value of the original MLC5 and MLC6 caps? Mine are clipped on one end. Could I just add a 36K resistor in series?

Going by memory I think the original ceramics was 100pf so it needs swapping for 100NF