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I suspect my C2300 has problem in one of reed relay for balance input , parts 087-050, does anyone know what the brand name and model number is? I know from service menu that it is 5v 1A 500 ohm. Thx

I am using MC 2505 for tweeters and mid, woofers by MC2205. According to spec, input sensitivity of MC2505 is 0.5v whereas MC2205 can be 0.75v or 2.5v (by switch). Thus, I switched MC2205 as 0.75v so that it can match to MC2505. Now, both amp (MC2505 and MC2205) are adjusted to mid position...

My sansui 999 was found that 1. When select source from AUX to Phono 2, pop sound happens, switch further to Phono 1, no pop sound. If switch back from Phono 2 to AUX, pop sound happens also. 2. If I adjust the Phono 2's input volume to zero, no pop sound was heard when switching between...

Dear all, My sansui 999 has a problem since I acquired it in 5 years ago. I recapped it already in 4 years ago and change all small transistors recently for all broads (except the speaker protector) but the problem still exist. The problem is that 1. when I select bass selector from 400 to...

Dear all, I need help from expert here. My MC2505 has problem in one channel (right) and it happened for 2 times. The symptoms were the same and it will be resumed by turn off and turn on the speaker switch while it is power on. My MC2505 was already recapped two years ago (except the big...

Hi all, I am going to recap C33. any advised, I have counted that it is approx. 78 caps. For the big cap 4700uf, which one you have used? Would anyone mind to share with me so that I can plan souring the required caps. Thanks!

Hi all, I am using MC2505, after searching from local 2nd store, I plan to purchase a C33, anyone tried this combination? Should it be better than C26, C28, C32 and C29?

Dear all, Anyway knows how to remove this plastic ring on the power cable? I would like to remove the original cable without cutting it and connect a IEC plug with cable so that I can connect other aftermarket power cable. I have tried to pull it out but not successful and I am afraid I...

After recapping electrotyic caps, finally I have decided to replace the input coupling cap (0.47uf) by WIMA MKP10 since I believe this cap affect much in sound quality. After run for 10 hours, the sound seems more transparent than before but Bass seems weaker. After running for 50 hours, the...

I am looking for Mc preamp with MC2505, currently, I am using a tube preamp (runing 2X6922 tube) and thinking if buying a Mc preamp for MC2505. Which one is good match with MC2505? C26, C28, C29 and C33. These all are approx. generation. Thanks for any comments.

I note my MC2505 bulbs are dimmed and would like to replace it. According to spec, panel is 1866 whereas meter section is 1888. What's the difference? they are standard 6.3v AC bulb? thanks!

I just inspected my MC2505, I found that when I power off it. The voltage of the Big Cap C30 will be discharged to 0v immediately but the Big Cap C29 will be remained at around 20v and the it will take approx. 3-4 mins to discharge as 0v. Please refer to enclosed pictures. I have enclosed the...

Dear all, After recapping, I would like to change the transistors of my MC2505 in order to extend its life. Anyone know the transistors or its subsistution? Part numbers are as the below: 132-057 132-056 132-028 132-021 132-032 132-023 132-024 132-070 132-095 Thanks!

Hi all, I am now tuning the vu meter of my MC2505 since I have changed the cap. and the potentiometer of the metering broad. I have search through the Internet about tuning VU meter (not specific MC2505, just general tuning theory) and some advise are found. I am using a 1khz -20dBFS wav...

Hi all, I just got a MC2505. It seems function properly, however, I wonder if I have to recap it as it should be a at least 3X years old. One thing suprises me is that I have checked the capacitors of the BIG cap (9300uf) by capacitor meter, it shows 10XXXuf, I don't know why this electro...