My try at a Really Nice Rebuild Marantz 1060

[pingu_turbo]

I'm sorry to hear that BK. Have some Brandy and Lovage. If it doesn't make you feel better, you really wont care how you feel.:drunk:

Get well soon. :thmbsp:

 

[bktheking]

Well I'm back and with total completion.

This is the p900 board, resistors and caps replaced as well as 2 transistors.

Resistors replaced on the board that houses the tone pots.

 

[bktheking]

Next I replaced the resistors that are on the board that has the speaker switches.

Next up was the amplifier board- resistors and caps replaced, some CAP values were increased. 2 caps were removed and jumpers were installed (c701 and c702), they are not needed.

I cleaned and regreased the outputs.

It's an early unit, there are brackets for the opt transistors- the opts are even different than production.

 

[patfont]

Beautiful, beautiful work, the most complete rebuild I have seen. And I am willing to bet this is not going to be pulled out of your hands any time soon.

 

[bktheking]

Had to reglue all the switch rubbers back onto the faceplate- all had come off when I removed the faceplate.

A small pile of parts, quite a long project:

 

[bktheking]

Beautiful, beautiful work, the most complete rebuild I have seen. And I am willing to bet this is not going to be pulled out of your hands any time soon.

Thanks Pat, notice the yellow wire had broke off the tone pot board- found that out when I fired it up. Resoldered and all good now. I'll post my thoughts once I'm done uploading pics.

 

[bktheking]

Top shot completed, also replaced the lamp and fuse to run the lamp:

Front shot:

Top shot with lid, it is that clean- the only flaw on the entire unit is a 1mm rust spot on the chassis.

 

[Leestereo]

A true labour of love. Looks great.

 

[bktheking]

Thanks Mr. Leestereo, I couldn't have done it without your valuable knowledge, dedication to the hobby and of course the the supplied parts you seem to always have!

 

[rBuckner]

Glad you're better! Very VERY nice rebuild bk. :thmbsp:

 

[pingu_turbo]

Well, that is brilliant. Glad to see it is all done. :thmbsp: But I'd love to know how is sounds. I know it is already leaps and bounds over how it was before, just curious to know about the resistors. :scratch2:

Also would you mind pm'ing the list of parts used? This is a totally different approach to how I would have looked at a refurbishment. :yes:

Congrats on your successful work, and leestereo for the commentary.

 

[Blue Shadow]

Once I sort the missing channel of my recently acquired 1030, I'm thinking this same rebuild might be in order for this little brother. The engraved faceplate, pre-main jumpers and wooden cabinet are helping me want this unit back in good working order with a rebuild.

 

[bktheking]

Yes leaps and bounds! I listening to some Korn , Pink Floyd , Justin Timberlake and Lady Gaga last night, the latter 2 for my daughter who came down for a listen. She gave it a 9 out of 10 whatever that means??? To sit and listen was a sound of 3 dimension. It's difficult to explain however I will try my best. It's bass heavy without loudness, bass needs to be dialed back a bit to get it under control. Once dialed back the bass is full and punchy but not sloppy. The mids and treble are spot on and the clarity is unbelievable. If you were to close your eyes and listen to each track, you'd swear the band or performer was right in front of you. I haven't had the chance to run vinyl through it, that's my plan later today. My test is the wall, there are so many different tracks on those records that either make an amplifier shine or show you where it's lacking. I'm also curious about it's max wattage, another measurement i'm going to take before it leaves the bench. I'll post more once I hear some vinyl.

I discovered there are a couple of errors in the manual, one resistor is missing from the list and one cap value is incorrect, i'll post those as well.

 

[Leestereo]

....just curious to know about the resistors. :scratch2:
...This is a totally different approach to how I would have looked at a refurbishment. :yes:

Congrats on your successful work, and leestereo for the commentary.

About the approach: Bktheking and I discussed this at length and since this was a "keeper", it was agreed that it deserved some special consideration. Hence, the refurbishment was not just a "part for part replacement", but along with the the use of modern parts (e.g., low ESR capacitors, stacked film capacitors, metal film resistors, "soft recovery" diodes), the circuit was analysed to see where conservative improvements could be made (e.g., increasing capacitance of some capacitors, possible since modern caps are physically smaller and the elimination of capacitors where possible). IMO, the fundamental sound signature of this Marantz is in the circuit topology; the objective was to maximize the potential of this particular design by using parts that weren't available in 1974 (e.g., low ESR caps), or were considered too costly for a mid-range commercial product by the bean-counters (e.g., metal film resistors). Another consideration was to keep the stock appearance of the unit, i.e., to the casual eye, all parts fit in the original positions, and there are no modifications to the chassis and all of the upgrades/replacements can be reversed if so desired.

How does it sound? Well at this point, only bktheking knows...in an earlier post he commented that the "power" was back after the power supply circuits were restored/upgraded, but in my last conversation with him he did use the word "outstanding"...

 

[patfont]

Yes leaps and bounds! I listening to some Korn , Pink Floyd , Justin Timberlake and Lady Gaga last night, the latter 2 for my daughter who came down for a listen. She gave it a 9 out of 10 whatever that means??? To sit and listen was a sound of 3 dimension. It's difficult to explain however I will try my best. It's bass heavy without loudness, bass needs to be dialed back a bit to get it under control. Once dialed back the bass is full and punchy but not sloppy. The mids and treble are spot on and the clarity is unbelievable. If you were to close your eyes and listen to each track, you'd swear the band or performer was right in front of you. I haven't had the chance to run vinyl through it, that's my plan later today. My test is the wall, there are so many different tracks on those records that either make an amplifier shine or show you where it's lacking. I'm also curious about it's max wattage, another measurement i'm going to take before it leaves the bench. I'll post more once I hear some vinyl.

I discovered there are a couple of errors in the manual, one resistor is missing from the list and one cap value is incorrect, i'll post those as well.

I use certain tracks of the wall also. The cut "The Trial" it is amazing the effect of the swinging door and the footsteps if the system will resolve it, and I know this 1060 will. Also "Blue Sky" and "Mother" the vocals can take on quite a hugeness. And of course the helicopter, can you play it at a good volume with out clipping or distortion. Looking forward to your impressions. I also usually like the Sheffield drum record, and "Dafos" (Mickey Hart) to me is the ultimate test. When the 25 foot "Beast" that holds the drum set up falls over it was left on the recording, you will get hit with a wall of air (bass punch)

 

[bktheking]

I'll be bringing it to you for a listen soon enough then you too can also post your impressions.

 

[bktheking]

I use certain tracks of the wall also. The cut "The Trial" it is amazing the effect of the swinging door and the footsteps if the system will resolve it, and I know this 1060 will. Also "Blue Sky" and "Mother" the vocals can take on quite a hugeness. And of course the helicopter, can you play it at a good volume with out clipping or distortion. Looking forward to your impressions. I also usually like the Sheffield drum record, and "Dafos" to me is the ultimate test.

The sound that does it for me is the Stuka dive bomber at the end of in the flesh, that's as real as it gets.

 

[patfont]

Thanks Pat, notice the yellow wire had broke off the tone pot board- found that out when I fired it up. Resoldered and all good now. I'll post my thoughts once I'm done uploading pics.

I now check all wires as a matter of course, on my 2245 I turned over the phono board way too many times listening to different caps and the white wire broke off (would have been no left channel) I did see it and resoldered.

 

[bktheking]

Not bad for an old clunker, made 43.7 watts just before clipping- 8 ohm load, 1khz signal- both channels at the same time.

 

[eddantes]

Jeezus man! Keep that bench tidy! Clearly there is no reason for the light-bulb to be there!

(a message from you friendly health n safety committee)

ALSO: Nice job man!