GrantMchls
New Member
Some of the lettering on the faceplate of my model eighteen has rubbed off over the years. does anyone know of a source for a replacement faceplate? Thank you in advance.
What did you end up using for CR13?I have restored three of the 18's and two 19's so far (they are all keepers) None of them worked properly when I got them.
I recaped the 18's fully. I tested each cap as I pulled it out with a Sencore FC-102 and never found a cap out of spec, nearly every cap read higher than normal. I will say that it sounds better after the recap, especially in the bass response, it sounds tighter. The sound has also improved over time, it sounds smoother. I suspect that the caps in the power supply, although still good, just don't work as well as new ones do, I also replaced some of the caps for new WIMA films so I am sure that has something to do with it too.
The biggest problem I have found was the diodes in the power supply. One of the zeners really had me stumped. It was CR13, if it opens it causes havoc with the AMP driver cards. I also had to replace some of the driver card transistors and output transistors.
I replaced the dial glass on two of them, on the third I very carefully cleaned the glass with a q-tip and invisible glass cleaner. If you touch the white lettering it will just fall off, I tried and failed. :tears:
I put in blue LED's for the dial glass. I tried several types and colors and finally settled on this:
The picture does not do it it justice.. My iPhone just can't capture how it looks.
I’m looking at a Midel 18 now. Was wondering the cost to have it rehauled. Want to make sure that my son has it for the next 40-50 years. ThanksI have restored three of the 18's and two 19's so far (they are all keepers) None of them worked properly when I got them.
I recaped the 18's fully. I tested each cap as I pulled it out with a Sencore FC-102 and never found a cap out of spec, nearly every cap read higher than normal. I will say that it sounds better after the recap, especially in the bass response, it sounds tighter. The sound has also improved over time, it sounds smoother. I suspect that the caps in the power supply, although still good, just don't work as well as new ones do, I also replaced some of the caps for new WIMA films so I am sure that has something to do with it too.
The biggest problem I have found was the diodes in the power supply. One of the zeners really had me stumped. It was CR13, if it opens it causes havoc with the AMP driver cards. I also had to replace some of the driver card transistors and output transistors.
I replaced the dial glass on two of them, on the third I very carefully cleaned the glass with a q-tip and invisible glass cleaner. If you touch the white lettering it will just fall off, I tried and failed. :tears:
I put in blue LED's for the dial glass. I tried several types and colors and finally settled on this:
The picture does not do it it justice.. My iPhone just can't capture how it looks.
Hey have you ever had one of the channels sound really distorted? Any idea what’s causing it?I have restored three of the 18's and two 19's so far (they are all keepers) None of them worked properly when I got them.
I recaped the 18's fully. I tested each cap as I pulled it out with a Sencore FC-102 and never found a cap out of spec, nearly every cap read higher than normal. I will say that it sounds better after the recap, especially in the bass response, it sounds tighter. The sound has also improved over time, it sounds smoother. I suspect that the caps in the power supply, although still good, just don't work as well as new ones do, I also replaced some of the caps for new WIMA films so I am sure that has something to do with it too.
The biggest problem I have found was the diodes in the power supply. One of the zeners really had me stumped. It was CR13, if it opens it causes havoc with the AMP driver cards. I also had to replace some of the driver card transistors and output transistors.
I replaced the dial glass on two of them, on the third I very carefully cleaned the glass with a q-tip and invisible glass cleaner. If you touch the white lettering it will just fall off, I tried and failed. :tears:
I put in blue LED's for the dial glass. I tried several types and colors and finally settled on this:
The picture does not do it it justice.. My iPhone just can't capture how it looks.
I was wondering if it's possible figure out the approximate manufacturing date of Model 18s based on serial numbers.
I've read that Marantz began serial numbers starting at 1000. So the first unit created would be 1001. If there were 7,000 models produced, that would mean serial numbers go up to approximately 8,000.
What's the highest serial number of an 18 anyone has seen? Low 8000s?
The earliest ads for the 18 appear in Oct. 1967. A Dec. 1967 Electronics World article states that the magazine didn't review the 18 for a receiver shootout because they received an engineering prototype from Marantz, not an actual production model. Unclear if that means it wasn't yet in production when the article was written (presumably in November 67).
I ran a quick search on the American Radio History website (which has an index of audio old magazines), and earliest mention I've found of the successor model, the Marantz Model Nineteen (19), in print advertisements is in the May 1970 issue of High Fidelity.
Do you think production of the Model Eighteen might have ended a earlier than June 1970 if they were beginning production of the 19? Or do you have data that shows June was the final production end?
If we assume production of the Model 18 began approximately in Sept. 1967 (just before the first print ads) and finished around April 1970 (the month before the 19 was first announced), that is 32 months and an average of 219 units produced per month (assuming production was steady throughout the run).
For 7000 units produced, that might translate to the below serial number ranges per month. Thoughts on if these production dates are accurate? Anyone have original sales receipts for their units to confirm? Also, what month and year did Marantz shift production from NY to California? I think all the 18s were made in NY. Were any of the 19s made in NY -- or were the earliest 19s produced in California?
Possible Marantz Model Eighteen production dates:
(Note: the below is only my best guess and could be inaccurate.)
Sep-67: 1001-1219
Oct-67: 1220-1438
Nov-67: 1439-1657
Dec-67: 1658-1876
Jan-68: 1877-2095
Feb-68: 2096-2314
Mar-68: 2315-2533
Apr-68: 2534-2752
May-68: 2753-2971
Jun-68: 2972-3190
Jul-68: 3191-3409
Aug-68: 3410-3628
Sep-68: 3629-3847
Oct-68: 3848-4066
Nov-68: 4067-4285
Dec-68: 4286-4504
Jan-69: 4505-4723
Feb-69: 4724-4942
Mar-69: 4943-5161
Apr-69: 5162-5380
May-69: 5381-5599
Jun-69: 5600-5818
Jul-69: 5819-6037
Aug-69: 6038-6256
Sep-69: 6257-6475
Oct-69: 6476-6694
Nov-69: 6695-6913
Dec-69: 6914-7132
Jan-70: 7133-7351
Feb-70: 7352-7570
Mar-70: 7571-7789
Apr-70: 7790-8008
Here's an image of the Oct. 1967 print ad.
I have one that is 18-9980I was wondering if it's possible figure out the approximate manufacturing date of Model 18s based on serial numbers.
I've read that Marantz began serial numbers starting at 1000. So the first unit created would be 1001. If there were 7,000 models produced, that would mean serial numbers go up to approximately 8,000.
What's the highest serial number of an 18 anyone has seen? Low 8000s?
The earliest ads for the 18 appear in Oct. 1967. A Dec. 1967 Electronics World article states that the magazine didn't review the 18 for a receiver shootout because they received an engineering prototype from Marantz, not an actual production model. Unclear if that means it wasn't yet in production when the article was written (presumably in November 67).
I ran a quick search on the American Radio History website (which has an index of audio old magazines), and earliest mention I've found of the successor model, the Marantz Model Nineteen (19), in print advertisements is in the May 1970 issue of High Fidelity.
Do you think production of the Model Eighteen might have ended a earlier than June 1970 if they were beginning production of the 19? Or do you have data that shows June was the final production end?
If we assume production of the Model 18 began approximately in Sept. 1967 (just before the first print ads) and finished around April 1970 (the month before the 19 was first announced), that is 32 months and an average of 219 units produced per month (assuming production was steady throughout the run).
For 7000 units produced, that might translate to the below serial number ranges per month. Thoughts on if these production dates are accurate? Anyone have original sales receipts for their units to confirm? Also, what month and year did Marantz shift production from NY to California? I think all the 18s were made in NY. Were any of the 19s made in NY -- or were the earliest 19s produced in California?
Possible Marantz Model Eighteen production dates:
(Note: the below is only my best guess and could be inaccurate.)
Sep-67: 1001-1219
Oct-67: 1220-1438
Nov-67: 1439-1657
Dec-67: 1658-1876
Jan-68: 1877-2095
Feb-68: 2096-2314
Mar-68: 2315-2533
Apr-68: 2534-2752
May-68: 2753-2971
Jun-68: 2972-3190
Jul-68: 3191-3409
Aug-68: 3410-3628
Sep-68: 3629-3847
Oct-68: 3848-4066
Nov-68: 4067-4285
Dec-68: 4286-4504
Jan-69: 4505-4723
Feb-69: 4724-4942
Mar-69: 4943-5161
Apr-69: 5162-5380
May-69: 5381-5599
Jun-69: 5600-5818
Jul-69: 5819-6037
Aug-69: 6038-6256
Sep-69: 6257-6475
Oct-69: 6476-6694
Nov-69: 6695-6913
Dec-69: 6914-7132
Jan-70: 7133-7351
Feb-70: 7352-7570
Mar-70: 7571-7789
Apr-70: 7790-8008
Here's an image of the Oct. 1967 print ad.
I was wondering if it's possible figure out the approximate manufacturing date of Model 18s based on serial numbers.
I've read that Marantz began serial numbers starting at 1000. So the first unit created would be 1001. If there were 7,000 models produced, that would mean serial numbers go up to approximately 8,000.
What's the highest serial number of an 18 anyone has seen? Low 8000s?
The earliest ads for the 18 appear in Oct. 1967. A Dec. 1967 Electronics World article states that the magazine didn't review the 18 for a receiver shootout because they received an engineering prototype from Marantz, not an actual production model. Unclear if that means it wasn't yet in production when the article was written (presumably in November 67).
I ran a quick search on the American Radio History website (which has an index of audio old magazines), and earliest mention I've found of the successor model, the Marantz Model Nineteen (19), in print advertisements is in the May 1970 issue of High Fidelity.
Do you think production of the Model Eighteen might have ended a earlier than June 1970 if they were beginning production of the 19? Or do you have data that shows June was the final production end?
If we assume production of the Model 18 began approximately in Sept. 1967 (just before the first print ads) and finished around April 1970 (the month before the 19 was first announced), that is 32 months and an average of 219 units produced per month (assuming production was steady throughout the run).
For 7000 units produced, that might translate to the below serial number ranges per month. Thoughts on if these production dates are accurate? Anyone have original sales receipts for their units to confirm? Also, what month and year did Marantz shift production from NY to California? I think all the 18s were made in NY. Were any of the 19s made in NY -- or were the earliest 19s produced in California?
Possible Marantz Model Eighteen production dates:
(Note: the below is only my best guess and could be inaccurate.)
Sep-67: 1001-1219
Oct-67: 1220-1438
Nov-67: 1439-1657
Dec-67: 1658-1876
Jan-68: 1877-2095
Feb-68: 2096-2314
Mar-68: 2315-2533
Apr-68: 2534-2752
May-68: 2753-2971
Jun-68: 2972-3190
Jul-68: 3191-3409
Aug-68: 3410-3628
Sep-68: 3629-3847
Oct-68: 3848-4066
Nov-68: 4067-4285
Dec-68: 4286-4504
Jan-69: 4505-4723
Feb-69: 4724-4942
Mar-69: 4943-5161
Apr-69: 5162-5380
May-69: 5381-5599
Jun-69: 5600-5818
Jul-69: 5819-6037
Aug-69: 6038-6256
Sep-69: 6257-6475
Oct-69: 6476-6694
Nov-69: 6695-6913
Dec-69: 6914-7132
Jan-70: 7133-7351
Feb-70: 7352-7570
Mar-70: 7571-7789
Apr-70: 7790-8008
Here's an image of the Oct. 1967 print ad.
I have one that is 18-9980
Hey have you ever had one of the channels sound really distorted? Any idea what’s causing it?