Happened in the earlier episodes:
I bought a cheap Yamaha CT-V1 tuner from 70s. It is the model with it's sister CT-V2 which got handles on fascia. Quite basic and simple analoque tuner, full hight and width box.
I did change nearly all the electrolytes and wired out the PSU caps & regulator.
Then changed the t-former a bit bigger, build a small card including four Schottky diodes as the rectifier and a bigger than original filtering cap added with small cap across.
Another small board consisted by DIY regulator with voltage reference and LT1086CT regulator.
All wiring was conducted by small silver plated PTFE insulated wires.
The new caps on the main board and the filter cap are of normal quality, nothing special. There is one old electrolyte still on the main board, a 330 uF as I did not have the value. Must be changed later.
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The tuner sounded quite different animal after modding.
Now, after about 3 weeks of use it is the best sounding tuner I have ever heard. Must admit I have not been too interested in tuners and thus not heard too many of them. It is about 20 years when I last time heard a Naim tuner for awhile..
The CTV-1 modded has a bit boosted bass as you would expect from a japanese tuner of 70s.
But it is delicious. As the tune is so marvellously good. The bass is just fantastic. And it seems to be tuneful through the range.
It is not perfect, still. Somehow it is a bit slow and clarity is not going through all the range.
But it is the best I have ever heard of. It is just unbelievably good now. So beautifully sounding.
I am planning to take the main board off once again and find out where is the borders of the line amp and the tuners. And then offer the line amp a separate, own cap+regulator. This should make it the ultimate tuner for me.
My friend asked me to check his old Yamaha T-450 which is the cheap basic low model, just a bit newer than the CT-V1 I assume. Quite much the same thing. The boards looked very alike as did the PSU.
On comparison T-450 sounded 100% crap agains my modded CT-V1. T-450 was lacking the tune overall. It was very distorted and midrange boosted. CT-V1 showed itself now as very much more sophisticated and musical - a real top and high class unit on comparison. Did not compare before modding but obviously they must have been quite close to each other.
Conclusion is that I just have to recommend this for you as a DIYer. Have a nice analogue tuner, renew the lytes and re-build the PSU. You will get something you might not find from shops today.
Oz
P.S. I am not using better than a small electronic FM antenna near the tuner itself.
I bought a cheap Yamaha CT-V1 tuner from 70s. It is the model with it's sister CT-V2 which got handles on fascia. Quite basic and simple analoque tuner, full hight and width box.
I did change nearly all the electrolytes and wired out the PSU caps & regulator.
Then changed the t-former a bit bigger, build a small card including four Schottky diodes as the rectifier and a bigger than original filtering cap added with small cap across.
Another small board consisted by DIY regulator with voltage reference and LT1086CT regulator.
All wiring was conducted by small silver plated PTFE insulated wires.
The new caps on the main board and the filter cap are of normal quality, nothing special. There is one old electrolyte still on the main board, a 330 uF as I did not have the value. Must be changed later.
-----
The tuner sounded quite different animal after modding.
Now, after about 3 weeks of use it is the best sounding tuner I have ever heard. Must admit I have not been too interested in tuners and thus not heard too many of them. It is about 20 years when I last time heard a Naim tuner for awhile..
The CTV-1 modded has a bit boosted bass as you would expect from a japanese tuner of 70s.
But it is delicious. As the tune is so marvellously good. The bass is just fantastic. And it seems to be tuneful through the range.
It is not perfect, still. Somehow it is a bit slow and clarity is not going through all the range.
But it is the best I have ever heard of. It is just unbelievably good now. So beautifully sounding.
I am planning to take the main board off once again and find out where is the borders of the line amp and the tuners. And then offer the line amp a separate, own cap+regulator. This should make it the ultimate tuner for me.
My friend asked me to check his old Yamaha T-450 which is the cheap basic low model, just a bit newer than the CT-V1 I assume. Quite much the same thing. The boards looked very alike as did the PSU.
On comparison T-450 sounded 100% crap agains my modded CT-V1. T-450 was lacking the tune overall. It was very distorted and midrange boosted. CT-V1 showed itself now as very much more sophisticated and musical - a real top and high class unit on comparison. Did not compare before modding but obviously they must have been quite close to each other.
Conclusion is that I just have to recommend this for you as a DIYer. Have a nice analogue tuner, renew the lytes and re-build the PSU. You will get something you might not find from shops today.
Oz
P.S. I am not using better than a small electronic FM antenna near the tuner itself.