"...from the place in Colorado..."
Actually, Oregon. But I'm working on having those made again.
Larry
Actually, Oregon. But I'm working on having those made again.
Larry
newer style knobs for the mc2105?
- Thread starter jeremyjustic
- Start date
The first run of C34V's used the longer C33 knobs as also used on the MR78 and MC2100/2200 family amps. That first run also had "silver" RCA jacks on the back and the main top cover did not have the large specification sticker. Inside, the first run used the C33 monitor amp board with TO-66 outputs. Later, they used plastic TO-220 outputs. Later versions had shorter/shallower knobs and gold RCA jacks. The shorter and longer knobs are interchangable. I know because I have one of each version C34V.
mpholland
R.I.P. Michael Sheppard
Thank you, that helps immensely. I am trying to find newer knobs for my MR74. I am thinking C34V Volume knob for mode selector and volume on tuner, then C34V selector knobs for the selectivity, muting, and filter on the tuner. Not sure about the tuning knob yet. I think I can still get all these new from AC.
All I can say is looking at ebay and what I have heard about AC, vintage knobs seem to be the most expensive parts for restoring units. They seem to run $25 to $50 each depending on size.
twiiii
Lunatic Member
Once upon a time way back when, I bought one of the very early MR-80. and it came with the new knobs, as I remember or maybe the MR-78 was the first. So the MC 2505 got new Knobs, the MPI-4 got new knobs. I'm at a total loss, maybe the C-29 I added newer knobs, too. I don't remember which knobs the MCD7005 came with, but it had the newer knobs, too, when sold. I even changed the brass end plates so they would all match at one time. I didn't like the straight brass pieces on some of the newer stuff so mine had the angle pieces like on my 2505 and MPI-4. I gave up on that when the MR-80 and C-34 came along. So now I have 4 different styles on end plates. The 207's, 206, MVP-861, MX-120 have the straight beveled brass pieces. The MAC-3 has the old very slim straight non- beveled polished end pieces. The C-34 and MR-80 have their own type of straight end piece. And the MPI-4 and MC 2505 have the original thin highly polished slanted end pieces common with the tube units though they don't have the wider end slot for the anodized bottom brass lower front plate. It seems like every time I turned around Mac was changing end pieces. I guess I should have kept my all brass knobs, but Davie O'brien and I swapped knobs even Steven. There were lots of folks that preferred the older knobs and wanted to buy new stuff ands didn't like the knobs with the black inserts. So I thought I came out ahead.
Pretty soon Mac units won't have any knobs at all, and that will be a shame, MC152 and 301. I enjoy what I have now because I can do what ever I want with a quick turn of a knob or touch of a switch. The idea of having to go into a menu to adjust something just takes to long using a remote control. And being able to go directly from one function to the next or going from one input directly to another via a knob is ever so much more efficient and time saving than cycling through steps on a remote control. The idea of just having a Volume control and Balance control on a unit depending on a remote for the other limited options is a total turn off for me, Whether its the new economical pre-amp or the top of the line tube C-1100T. Where's a C-40, when you want something that is easy to use.
Pretty soon Mac units won't have any knobs at all, and that will be a shame, MC152 and 301. I enjoy what I have now because I can do what ever I want with a quick turn of a knob or touch of a switch. The idea of having to go into a menu to adjust something just takes to long using a remote control. And being able to go directly from one function to the next or going from one input directly to another via a knob is ever so much more efficient and time saving than cycling through steps on a remote control. The idea of just having a Volume control and Balance control on a unit depending on a remote for the other limited options is a total turn off for me, Whether its the new economical pre-amp or the top of the line tube C-1100T. Where's a C-40, when you want something that is easy to use.
Last edited:
mpholland
R.I.P. Michael Sheppard
Looks like around 100 for 5 of the 6. Not sure about the tuning knob yet. Don't know if an MR80 knob will work or not.
“Do the C34V end caps fit on an MR74?”
Yes, they do. All of the early “pointed” end caps (MC2105), the later “flat” end caps (MC2125) and the “square” dull aluminum end caps (MC150) of the same size units are completely interchangeable. You can either backdate a unit with older end caps or update older units with the later end caps. The only exception is the half-glass units which used the pointed end caps with a slot for the glass.
“I am trying to find newer knobs for my MR74. I am thinking C34V Volume knob for mode selector and volume on tuner, then C34V selector knobs for the selectivity, muting, and filter on the tuner. Not sure about the tuning knob yet.”
Figuring out McIntosh knobs can be a mine-field to navigate.
The very early units that used the black-center knobs were pretty easy. The MC2125 used the 090-157 knobs for all shafts. The MC2205 used the larger 090-156 knobs for all shafts.
The pre-amps and tuners used a variety of sizes – some of which were the “compound” knobs with a rear section and a front section. During the changeover from the older style knobs to the newer knobs, the United States was (supposedly) transitioning to the metric system. Some of the switch/tuning/pot knobs during this time were sourced as American and some were sourced as Metric.
On the same unit you may find both American and Metric sized shafts – and American and Metric sized knob inserts. They are not interchangeable. (and as John pointed out, there were longer and shorter knobs of the same diameter).
The C33 preamp used 5 different knobs:
Mode Selector: 090-169
Volume/Listen/Record: 090-170
Equalizer: 090-171
Ratio & Loudness (front): 090-186
Compandor & Balance (rear): 090-187
The MR74 tuner used 3 different knobs:
Volume/Mode Selector: 044-372
Filter/Selectivity/Muting: 044-428
Tuning: 044-272
During this time the knobs may be marked on the back side with an A or an M designating the shaft type that they fit.
Buying knobs from E-bay may or may not get you what you want. Your best bet is to contact Audio Classics to assure you can get a set of knobs that will actually work on your modified unit. There is a finite number of “extra” knobs available out there, hence the high prices for them.
Larry
Yes, they do. All of the early “pointed” end caps (MC2105), the later “flat” end caps (MC2125) and the “square” dull aluminum end caps (MC150) of the same size units are completely interchangeable. You can either backdate a unit with older end caps or update older units with the later end caps. The only exception is the half-glass units which used the pointed end caps with a slot for the glass.
“I am trying to find newer knobs for my MR74. I am thinking C34V Volume knob for mode selector and volume on tuner, then C34V selector knobs for the selectivity, muting, and filter on the tuner. Not sure about the tuning knob yet.”
Figuring out McIntosh knobs can be a mine-field to navigate.
The very early units that used the black-center knobs were pretty easy. The MC2125 used the 090-157 knobs for all shafts. The MC2205 used the larger 090-156 knobs for all shafts.
The pre-amps and tuners used a variety of sizes – some of which were the “compound” knobs with a rear section and a front section. During the changeover from the older style knobs to the newer knobs, the United States was (supposedly) transitioning to the metric system. Some of the switch/tuning/pot knobs during this time were sourced as American and some were sourced as Metric.
On the same unit you may find both American and Metric sized shafts – and American and Metric sized knob inserts. They are not interchangeable. (and as John pointed out, there were longer and shorter knobs of the same diameter).
The C33 preamp used 5 different knobs:
Mode Selector: 090-169
Volume/Listen/Record: 090-170
Equalizer: 090-171
Ratio & Loudness (front): 090-186
Compandor & Balance (rear): 090-187
The MR74 tuner used 3 different knobs:
Volume/Mode Selector: 044-372
Filter/Selectivity/Muting: 044-428
Tuning: 044-272
During this time the knobs may be marked on the back side with an A or an M designating the shaft type that they fit.
Buying knobs from E-bay may or may not get you what you want. Your best bet is to contact Audio Classics to assure you can get a set of knobs that will actually work on your modified unit. There is a finite number of “extra” knobs available out there, hence the high prices for them.
Larry
mpholland
R.I.P. Michael Sheppard
Just realized that you are right across the river from me. I have to cross that damn bridge twice per day.
Guess I forgot to mention the why.
I have a C34V, an MC2205, and an MR74. I like things to match. Seems it would be a bit less expensive to buy 6 knobs than an MR78. My C34V knobs won't fit as they are metric. That is why I was questioning the C33 knobs to see if they were also. I would also like to put C34V end caps on the MR74. I think I can live with the polish on the 2205. At least it is the same shape. It may also be possible that if I can find a correct size knob, just use 5 of the same on the tuner. Know if the MC7150 power knob is metric or not? I think the tuning knob from an MAC4100 may sub if it isn't metric. AC only wants 17 and 15 for them respectively.
Both the MC7150 power knob and the MAC4100 tuning knobs are American size.
Larry
Larry
mpholland
R.I.P. Michael Sheppard
Thanks. I see you own both. Any chance you might be able to get me a diameter on those knobs? I would sincerely appreciate it. I am looking for about 1.25" for the tuning knob and about 1" for the other 5. Are they the same depth as the older C34V and 2205 knobs?
Thanks,
Marc
Sure - the MC7150 knob is 13/16" diameter and the MAC4100 tuning knob is 1-1/2" diameter.
Note that the MAC4100 knobs are different from the component knobs - they have a much deeper recess on the rear of the knob - the lands and grooves are shorter.
Larry
Note that the MAC4100 knobs are different from the component knobs - they have a much deeper recess on the rear of the knob - the lands and grooves are shorter.
Larry