Hi there,
I have a vintage Cambridge p40 mk2 that has these 3 symptoms:
1. from time to time I loose sound in one of the speakers.
Seems the issue is getting fixed after I play with the sources-switch(the blue one from pics inside) .
2. From time to time instead of just loose sound, a lot of distortion is getting applied.
Seems the issue is getting fixed after I play with the sources-switch(the blue one from the inside pics), or/and play with the mono toggle btn.
3. The sound on the left speaker misses some of the brightness. Some high frequenccies are not there, and the sound is kinda dull.
I exchanged speakers, cables, sources etc. The issue is clear if you focus and move the balance from one speaker to the other, or if you play a test "song" to check right and left. With both speakers on, its not easy to feel the difference. Someone can might only feel that the center of the sound is closer to the right(good) speaker.
Overall the sound is wonderful even with the left being duller than it should.
I have it paired with a set of wharfedale Diamond 8.2, 6Ohm 100 watt (I'm worried these are rated at 6Ohms while searching for the Amp I only find 8Ohm recommendations).
I made one more step forward, and I opened the amplifier trying to get any clear evidence of what might be wrong.
From inside, looks so clear and nice.
I only found 2 really thin packs of coil that seemed they somehow moved away from the ground(yellow-green cable), where they should be connected maybe?
I am attaching photos!
Thanks in advance!
I have a vintage Cambridge p40 mk2 that has these 3 symptoms:
1. from time to time I loose sound in one of the speakers.
Seems the issue is getting fixed after I play with the sources-switch(the blue one from pics inside) .
2. From time to time instead of just loose sound, a lot of distortion is getting applied.
Seems the issue is getting fixed after I play with the sources-switch(the blue one from the inside pics), or/and play with the mono toggle btn.
3. The sound on the left speaker misses some of the brightness. Some high frequenccies are not there, and the sound is kinda dull.
I exchanged speakers, cables, sources etc. The issue is clear if you focus and move the balance from one speaker to the other, or if you play a test "song" to check right and left. With both speakers on, its not easy to feel the difference. Someone can might only feel that the center of the sound is closer to the right(good) speaker.
Overall the sound is wonderful even with the left being duller than it should.
I have it paired with a set of wharfedale Diamond 8.2, 6Ohm 100 watt (I'm worried these are rated at 6Ohms while searching for the Amp I only find 8Ohm recommendations).
I made one more step forward, and I opened the amplifier trying to get any clear evidence of what might be wrong.
From inside, looks so clear and nice.
I only found 2 really thin packs of coil that seemed they somehow moved away from the ground(yellow-green cable), where they should be connected maybe?
I am attaching photos!
Thanks in advance!
Attachments
Last edited:
Use deOxit D5 spray cleaner in the switches and pots.
Spray only a very slight amount into the switch or pot, and then exercise the control several times.
Repeat if necessary.
https://www.amazon.com/Hosa-D5S-6-DeoxIT-Contact-Cleaner/dp/B00006LVEU/ref=asc_df_B00006LVEU
Spray only a very slight amount into the switch or pot, and then exercise the control several times.
Repeat if necessary.
https://www.amazon.com/Hosa-D5S-6-DeoxIT-Contact-Cleaner/dp/B00006LVEU/ref=asc_df_B00006LVEU
Can you post a photo of the coils?
I haven't used a better cleaner than deOxit D5. Check Amazon UK:
https://www.amazon.co.uk/Caig-DeOxit-Contact-Cleaner-Spray/dp/B00A2365BI
I haven't used a better cleaner than deOxit D5. Check Amazon UK:
https://www.amazon.co.uk/Caig-DeOxit-Contact-Cleaner-Spray/dp/B00A2365BI
They are visible in 2 of the posted images.
You can see here @rayma
https://www.diyaudio.com/community/attachments/img_20250103_154747-jpg.1410147/
https://www.diyaudio.com/community/attachments/img_20250103_154719-jpg.1410148/
many thanks!
You can see here @rayma
https://www.diyaudio.com/community/attachments/img_20250103_154747-jpg.1410147/
https://www.diyaudio.com/community/attachments/img_20250103_154719-jpg.1410148/
many thanks!