Kenwood KR-6030

Mar 13th, 2017 Posted in Kenwood, KR-6030 | No Comments »

Kenwood KR-6030 Front

 

This is a nice Kenwood offering from circa 1978 until about late 1979. It's the Kenwood KR-6030. It has the classic look of 1970's Kenwood's with the exception of the large push buttons that the earlier models used. Instead Kenwood went to toggle switches. The KR-6030 generates plenty of power at 80 watts per channel into 8 ohms and total harmonic distortion of 0.1%. Like a lot of the other Kenwood models it has a great FM tuner section as well. Not bad for a retail price of $525.00.

 

 

Kenwood KR-6030 Knobs

 

The KR-6030 also has a loudness switch, tone defeat switch and a subsonic filter switch. The analog meters are for tuning and signal strength. Options for the KR-6030 include the CB-12K walnut veneer cabinet, the B-12 simulated walnut veneer side panels and the D-7 rack mount handles.

 

Kenwood KR-6030 Switch

 

The dark dial face and amber white lights make for a nice looking display in a dark room though the KR-6030 is not usually mentioned as having a great look aesthetically.  Without the wood cabinet or side panels there is nothing to mute the overall metallic look of it. The orange stereo and phono lights don't help much either.

 

Kenwood KR-6030 Inside

 

As with any vintage receiver the Kenwood KR-6030 is not without its problems. The most common is probably with the power switch. The switch is under engineered and tends to arc internally causing a build up of carbon which can lead to the switch failing. When this happens either the switch will not work at all or you will see the stereo's lights flicker and perhaps hear a buzz when turning the unit on. There is a fix but it's not for the layman. You can find more information HERE.

 

Kenwood KR-6030 Inputs

 

At roughly 19 x 6 x 16 inches it's a decent sized receiver and it weighs in at a shade over 34 pounds (15.5 kg).

 

Kenwood KR-6030 Ad

 

The Kenwood KR-6030 is a good stereo. Plenty of power and enough features for the average user. It doesn't have the reputation of equivalent Marantz or Pioneer units which makes it a little bit of a sleeper.  The power switch issues is a problem but can be fixed by a good technician.  A really nice KR-6030 will sell for $200 to $250. An average unit for around $100 to $150. That's not a bad price for a receiver with its power and performance.

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Pioneer SX-3700

Feb 15th, 2017 Posted in Pioneer, SX-3700 | 2 Comments »

Pioneer SX-3700 Front

 

From that slightly awkward time that lies between the fully analog and fully digital eras come the Pioneer SX-3700. It was 1980 and digital displays were just catching on and Pioneer sought to capitalize on the movement with its Fluroscan technology. The SX-3700 produces 45 watts per channel and incorporates a direct coupled amplifier design.

 

Pioneer SX-3700 Meter

 

 

There is a variant of the SX-3700 labelled the SX-820. Apparently it is a European version but has a black dial face and white Fluroscan. A couple other SX-3000 series receivers also had European variants in the SX-620, SX-720.

 

Pioneer SX-3700 Knob

 

As you can see the Fluroscan display shows the tuning for the FM band. The analog dial shows both FM and AM tuning. The power output meter is also a Fluroscan display. Pioneer utilized a 3 gang FM tuning capacitor and quartz servo lock technology to create a very good FM tuner section. The Fluroscan FM display is backed up by a quartz crystal oscillator that provides a stable time base so that the correct numbers will always be displayed for a given frequency selection. The display is also 5 digits as opposed to many other manufacturers that used only four digits. Pioneer referred to all of this as their P.D.Q. or Pioneer Digital/Quartz tuning technology.

 

Pioneer SX-3700 Inside

 

The SX-3700 was a mid range receiver and had bigger brothers in the SX-3800 and the SX-3900. But, those receivers had more complicated designs and are more difficult to work on than the SX-3700.

 

Pioneer SX-3700 Inputs

 

If you like the Fluroscan display then the Sx-3700 (or SX-3800, SX-3900 depending upon your budget) might be the way to go. They do look very nice in the dark and are a good representation of the technological shift from analog to digital. They are also very good performers and can be found for a price that is within most budgets. A fully serviced unit will sell for around $300 while the average working unit will sell for $150 to $200.

 

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