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Analog radio

Analog radio seems to be alive and well here in the USA. There was never the same push to convert all broadcasts to digital, as there was with broadcast TV, probably because the bandwidth to be gained wasn't worth it.

OTOH, I'm a big fan of HD radio. It gives a much cleaner signal than FM, especially for car radio. Plus, so far, most of the extra HD radio stations are commercial free, which is a real treat if you like to have the radio on at work. The drawback is that HD radio here is patented by a single company, and finding HD radio sets can be a bit of a treasure hunt. Not so much a problem with car stereos (at least not aftermarket) but for clock radios/tabletop/receivers there are very limited offerings. I wish more home theatre receiver mfg's would include HD radio on their systems. So far I've only seen it on very high end Yamaha systems, with some mid-end systems offering it as an extra optional add-on. To work around this I recently bought some small Insignia desktop HD radios. FM only, no AM. But they work well enough and have a headphone output that can be funneled into the aux-in of a bigger stereo system. Not ideal but workable.

The proponents of HD radio say it can deliver CD-quality FM and FM-Quality AM. Very few HD-AM radio stations on the dial in my area, but most of the major FM stations have HD radio capability. My favorites include a station that plays non-stop "smooth jazz" radio without any commercials. It's great since the only other such analog FM radio station (KKSF) when to rock oldies a few years ago.

The cloud on the horizon is that if HD radio does catch on here, stations are likely to start adding commercials, and/or try to restrict signal reception to sets that pay a subscription fee. Technically it could be done. Politically it's probably not going to happen any time soon, as it would mean people having to get new sets to "unlock" the signal. And since it hasn't happened yet with digitized broadcast TV, I doubt it will hit digital radio any time soon.

As far as modern hi-fi... well, I think the modern higher end home theatre receivers can do a pretty good job. Unfortunately most of them lack a phone pre-amp but it's possible to add one on, and more turntables seem to be coming with line-out capability anyway. No, it's not top of the line sound but it's quite good when you get out of the package home theatre deals (like receiver/DVD player combos and speakers all in one package).

I don't know about speakers not lasting. I still have my Polk Audio 10's from the 1970's and they work just fine. Although I confess I haven't listened to them for a few years now (still rearranging things). But it's good to hear that modern speakers may be even better.
 
McIntosh

is still effectively US controlled, all the D & M, Clarion, Fine Sounds have been smart enough to leave operational control right here, and not mess with a good thing, they realize that. I know Charlie Randall, CEO of McIntosh here, through my previous editing/writing for an audio magazine, VTV: www.vacuumtube.com I was scheduled to write a multi-part article on the company, and had clearance from Denon in Japan, when the magazine that I wrote for folded, like so mamy niche publications in recent years.

I took my home built tube amp to a McIntosh clinic in 1964, and the McIntosh Technical Rep, Davy O'Brien, couldn't have been nicer to a young kid. He lived right here in Binghamton NY, until he died 2 years ago, a real gentleman.
 
HATE those silly LED lights at the bases of tubes-glad you can turn it off on that "MAC" amp.Those are just a waste of power and accomplish nothing.After all the FILAMENTS of the tube give you a satisfying glow!Haven't seen any MAC amps at the BB near me.And another thing like to see the tube glow by itself-you can then easily spot a tube whose filaments have burned out.
HD radio-being in the tech side of radio-this is an interesting delima for both stations and customers.Did buy a HD radio AM-FM tuner from Best Buy.Indeed the FM who uses it is CD quality.The AM stations here don't use HD.For the station it is a substantial investment in equipment.For FM HD-involves an additional transmitter along with the analog one.Next they have to be diplexed into the same antenna.The diplexer has to be carefully tuned so the transmitters don't feedback into each other.For AM--again a new transmitter has to be purchased by the station.older ones may not pass the low level injected HD signal.The levels of the analog and HD have to be carefully adjusted.If the analog signal into the transmitter is too high you get "hole punching" in the digital part.If the digital signal injection is too high-you get noise on the analog.Another question for AM stations--will the phasor and ATU's pass the digital signals.That 40 year old phasor and ATUs just won't work with the digital signal.So the station has to replace that equipment.Then whats so funny-stations don't promote they installed the HD equipment.so the listner doesn't know they have it.And radio builders don't promote it either.Stores don't carry it.The one I bought from BB was the only HD set they had.I ask about HD radios and the salesman looked at me as though I had lobsters crawling out of my ears.I then had to explain to him-then he showed me the HD AM-FM tuner.Like a regular tuner was designed to be used with your Hi-Fi system.Does work well.At present in large citys where HD AM is used-some stations under the permission of the FCC are turning off their analog and using digital only to see how their listeners react.This could be an interesting experiment.Oh yes for those who want to know--Phasor-not the gun used in Star Trek-but a device used at the AM stations transmitter site that divides the single transmitter input to feed the towers at the station-provides the power need by the tower and phasing-this sets the direction the station broadcasts to.Provisions are made in phasors for day-night operation-the stations pattern changes at night.ATU-Antenna Tuning Unit-this device matches the transmission line from the phasor or transmitter to the impedeance and reacttence of the tower.These devices have variable capacitors and inductors so you can tune them.ATU's are frequent victims of lightening hits.Components in them get burned,or even completely blown up by lightning.I get to replace those parts.
 
Some years ago I went looking for a new stereo system for the first time in twenty years, and was totally unimpressed. All style and no substance seems to come standard these days. So out of frustration I turned to the internet in search of quality vintage gear(that I could afford) and stumbled across a web site called Silver Pioneer. It was a well written and entertaining site, at least I thought so, and I was hooked. So I picked these up and have never regretted it. Everything about them says quality, and not only are they repairable, they're actually worth repairing, which is a nice change. So like those that chimed in before me, I vote for vintage.

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Pioneer Receiver

David,

Which model Pioneer receiver is that beauty? It must be a near-TOL. I'm guessing its about the same vintage as the shop receiver here, an SX-650.

We found ours about 10 years ago sitting on the curb on a neighborhood clean-up day. It has run ~12 hours a day, every day for that time period driving 6 (yes 6) speakers in the shop.

I have had it apart and did the full Caig Labs treatment to the controls and I have a box of new electrolytic capacitors I ordered for it. I've had the caps for about a year and just haven't bothered to swap them out yet, crazy thing just keeps on going! I think it might sound better after the capacitor swap, but a machine shop isn't a hifi listening room!

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Green LED's

Rex, I sure agree that those LED's in that Mac don't accomplish anything (other then making a several thousand dollar amp look stupid!). I bet the purists in the company were bent when marketing told them to add them...

I'm not sure I'd complain that they waste power though, the filaments waste a lot more. All for the experience and the "agreeable distortions" tubes and a magnetically coupled output stage give...
 
Phil

It's an SX-1080, so it's third in line from the top, with the 1280 and 1980 above it. And it is a beauty, isn't it. At least that was my first thought when I took it out of its package. Such attention paid to even the smallest of details, and a quality of workmanship and materials that you just don't see much anymore. It's good to hear that your SX-650 is such a trooper. With any luck my receiver will hold up just as well.
 
LED tube light-why run the LED lights when the filaments already produce light as a byproduct of their operation?Guess I'll have to put LED lights on all of the tubes in our transmitters?The filaments in one of our transmitter tubes is 12V@2000A!Guess that would light a lot of LEDS.I just don't understand the need to light the tubes-guess it looks cool.
 
Those Pioneer receivers did give a lot of performance for the money. They sure sold a ton of them here in the U.S. during the 1970's.

The only thing difficult about them is when the tuning dial lights go out on them.
They can be difficult to source the bulbs and difficult to replace as they are wired into the lighting circuit rather than placed in a socket or holder of some kind. But it can be done and they last a long time.

Another receiver I had as a kid was an Onkyo TX-1500. They were just as good if not slightly better than the Pioneers of the time. And they were most definitely underrated as far as continuous power went. Onkyo must have sold a ton of them because it seems they are always available on Ebay.

http://www.ebay.com/itm/Onkyo-Servo...34?pt=US_Stereo_Receivers&hash=item257b210e8e
 
As an eBay Associate we earn from qualifying purchases.
"vintage" components give me happy feet

I've always had a love affair with audio components. There is some very nice equipment pictured on this thread. Many years ago when my friends had portable stereos with flip-down record changers I saved my money and bought a used Harmon Kardon Stereo Festival receiver from a high-end audio store in downtown San Jose...Alco Paramount. This 24-vacuum tube receiver (my Magnavox Concert Grand has 40) was already dated when I bought it but was totally cool, tons of knobs & lights and a very nice brushed copper front.

notice the independently operated AM & FM tuning dials and the AM/FM spot on the function knob...a reminder when you could listen to stereo radio using an AM radio for one channel and and FM for the other...guess which one sounded better?

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Joe -

that was the first integrated stereo receivers ever made, had one years ago. I still have the SAMS Photofact with specs, schematic, and alignment procedure if you need it... this one had 4 x 7408 output tubes iirc? a juiced up industrial 6V6GT tube basically.
 
The GE Multiplex

FM standard came in shortly after this H-K was made, around 1961, and made the 2 separate dials redundant. Here one literally had to tune in to an FM and AM station at the same time in order to get a primitive stereo signal, I'm sure tolivac can elaborate on this, being a radio guy.
 
AM/FM "stereo" Used to have a McIntosh tuner that was set up with the tuning sections independent of each other.A radio station I worked for used to do the AM/FM stereo-the broadcast the left channel on the AM and the Right on the FM.They did not have a stereo generator in the FM transmitter at that time-and before multiplex FM came out.Most FM transmitters at that time had frequency multiplication in the power stages-usually in imtermediate amp or driver-the final RF Amp in the transmitter ran on frequency.Stereo generators could not be used in those old multplier transmitters-lots got junked in those days when multiplex stereo came out.Starting in the early 60's FM transm itter RF power amps were "on frequency" so modern on frequency direct FM exciter and stereo generators could be used with them.
7408 tubes-also rang a bell with me-see these being liked by guitarists-they use them in their "G" fiddle amps that have 6V6GT.Either single end amps or PP ones.
 
Advice on this subject, anyone....

I have an ailing stereo system that I purchased around 1980. The reel to reel was purchased a few years before that. I purchased several different components until I got the combination I thought I wanted. Over the years each piece has gradually deteriorated to the point of uselessness. The HPM-100's are the only thing that still works. I would like to send my components to a reputable person or persons for restoration. 

 

I restored the cassette deck a few years ago. It took nearly a year and a lot of time. I don't have the time or equipment to do all the pieces myself. If I find some reputable people that are in this business I could send the components in one at a time and they could advise whether or not I should have the components repaired or replaced with a comparable unit. Maybe someone in this business could take my old units in on trade for parts. I would imagine there are some people out there that do that. I'd rather keep my old units, but I would consider replacement if repair proved too costly. 

 

If any of you have done this or know someone who has, I would appreciate your input.

 

Thanks.

 

Brian
 
The first patient. A Kenwood KR-9050, which worked fairly well until two summers ago when it was a victim of an indirect lighting strike. Lighting hit the line and there was a surge on one of the legs in the house. After that when I turn it on it will run for about 20 or 30 sec., one watt meter will register and then its over load/protect relay will click off and it will go silent.

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Some of the function lights are burned out as well as some dial lights. Here the receiver is tuned into a station with a strong signal. The stereo light is working but the FM light is out. It's past the first 20-30 seconds, so it is receiving a signal but not putting out sound as the relay has tripped. This is what started after the lighting strike; the receiving but not producing sound. The panel lights have been slowly going out over the years.

[this post was last edited: 3/23/2013-06:53]

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It has an FM lock function that is kind of quirky and worked on and off for several years and finally quit working. The idea is to tune in the station and if the lock button is on, the receiver will automatically lock onto the station perfectly when the dial is released. It's touch sensitive. A neat feature, but trouble prone.

[this post was last edited: 3/23/2013-09:03]

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Finally, the last thing that is wrong; the power switch went out a few years back. I took it to a local shop and they said the switch was NLA, but they could wire past it and it would run when plugged in. I had them do this and bought a small RF, battery operated remote control to plug in the wall so I could turn it off and on easily. The power switch is at the lower left in this photo.

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Of course there is no surround sound with this system, but the sound was fantastic. And when the Bose 901's were turned on there was a great spacial sound.

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The second patient. A Pioneer PL-610 turntable. This device has been troublesome for quite some time. When I originally purchased it, it was an out of the box in store display model. The shop owner told me that when he received it, it ran backwards. He said it had been sent back to the factory and repaired and had ran fine ever since. I was young and stupid, saw a neat piece of equipment for a good price and purchased it. Of course I now know that someone else had purchased it and returned it, he probably sent it to a factory authorized service center and put it back on the floor. I know it didn't go back to Japan.

 

It worked fine for probably 10 or 15 years and then started to act up. When I would move the tonearm over the record sometimes it would move an inch or two in both directions and then start turning the right direction. It did this off and on for a few years and then one day it started running backward. It would do this for a few minutes and then run the right direction.

 

Then while playing it began not holding a steady speed. I would turn the quartz lock off and run it with the pitch gauge on and adjust it manually, then I would lock it back on. This worked for awhile, but eventually it would not hold a steady speed in any mode.

 

I took it apart and cleaned the pot that adjusts the pitch. This seemed to help for awhile, but didn't solve the problem completely. When the quartz lock button is pressed, the pitch adjustment needle is supposed to automatically return to zero (center) and the light on the pitch adjustment dial goes out. The light goes out, but the needle continues to respond, even though it's not supposed to and it usually doesn't return to 0% (center).

 

The arm-elevation (cueing arm) quit working properly. It's driven by a belt connected to a small motor. I replaced the belt, but I think I didn't get the exact size needed. It elevates and stops now, but when it's lowered the motor continues to run and it makes a "click-click sound over and over and I can see the arm elevator rod moving up and down in synchronization with the clicking sound. I just turn it off to make it stop. 

 

I don't know about this turntable. It seems very troubled. It seems it would take someone who knows a lot about this type of design to fix it. I think it's over engineered. I like it and it looks cool, but I don't know if there's a cure.

[this post was last edited: 3/23/2013-09:15]

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The third patient is a Teac Real to Real. It hasn't worked for a long time either. It's was a really nice machine at one time. It has seven inch reals, automatic reverse, direct drive capstan and outboard Dolby N/R. It was running one day and it suddenly started running extremely fast. It was like Alvin and the Chipmunks jumped in there. All I can figure is the logic circuit that controls the motor speed went out or the servo went out. I think this might be fixable. I found this site. Don't know anything about him. He seems legit.

[this post was last edited: 3/23/2013-09:16]

http://southernreeltoreeltapedecks.com/
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good old gear

that kenwood is really pretty-hope someone can help you get it going again,the other stuff is pretty nice too and prime era as well.
 
Well, you could look at the Dual Reference Website which I operate. We have a Parts/Service list which lists some companies that do service vintage equipment.
I know that the Stereo Exchange in Chicago and Classic Audio Repair do work on most brands of equipment from that era.

Roses Electronics here in Houston is a really great place to have work done, but I'll tell you up front they are expensive $$$$$!

I can personally vouch for all these companies as being very reputable and having a high level of customer satisfaction.

http://www.dual-reference.com/Contacts/SCmain.html
 
A bit closer to MD...

Audio Classics in Vestal NY (Binghamton) is probably the best known vintage audio repair and service business in the world, one of McIntosh'd largest dealers, and is known for excellent repair service, also not cheap, but done right. One of their "repair guys" is Richard Modafierri, retired McIntosh engineer and designer of several of the Mac tuners, now in his 70s he works part time from his home doing some of their repair work, just to keep busy, sort of typical of the caliber of work that AC does... http://www.audioclassics.com They will take shipments for repair, call the Service Dept to arrange.
 
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