Quad FM3 Tuner

Quad FM3 Tuner


The Quad FM3 Tuner was Quad's second tuner and quickly became the audiophile tuner of the 1970's. It was also Quad first transistor tuner, the Quad FM2 being a tube design, although there were some late version tube Quad FM2 that appeared in the same casing as the Quad FM3 bundled with a transistor based stereo decoder but these are quite rare as only about 7,500 units were ever produced.

The Quad FM3 Tuner was very simple to operate, you had a large tuner wheel to the left of tuning scale - when a suitable signal was found a red led would light up below the tuning scale and the Quad FM3 Tuner also had another red led to indicate a stereo signal had been found. Whilst the Quad FM3 Tuner had no presets as such, the tuning scale on the Quad FM3 Tuner did have five adjustable white pointers which could be moved up and down the scale so that the listener had a guide to help them tune into a desired station.

The Quad FM3 Tuner was a very natural sounding tuner and many are still sought after today because of this. As with all truly great tuners, a good quality aerial was a must and the Quad FM3 Tuner was able to accept either a 75 ohm coaxial or a 300 ohm balanced type of aerial.

The Quad FM3 Tuner was discontinued in the 1982 with the advent of the Quad FM4 Tuner, but in the 11 years it was in production, it still managed sales of over 50,000 units. The Quad FM3 Tuner is a classic FM tuner with a very classic sound.

Quad FM3 Tuner Specifications
Frequency Range: 88-108 Mhz
Sensitivity: 30db sig:noise for 1uV
Aerial Input: 75 ohm (coaxial) / 300 ohm (balanced)
Image Rejection: 56db
Frequency Response: 20-15khz (+/- 1db)
Channel Separation:40db at 1Khz
Distiortion: <0.3%
Output: 100 mV for 30% Modulation
Dimensions (WxDxH): 260 x 165 x 92 mm
Weight: 2.7 kg

This entry was posted on Friday December 30th, 2005 at 11:22 AM and is filed under Tuners. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response.

7 Responses to Quad FM3 Tuner

Adrian munsey Says:
April 26th, 2009 at 10:42 PM

Are there any people doing upgrades for the FM3?

Just bought one and worried it may be noisy like my Leak - even though I have a good aerial.

Adrian Says:
May 13th, 2009 at 10:16 PM

The FM3 does not need an up-grade. It may need servicing and would strongly recommend that you entrust this only to Quad. They will service this unit for you if you send it to them and it will come back as new, although make sure that there is a good strong signal coming into the tuner first. The ones I have are still in good condition after a very long period of time. From your question, it seems as though you haven't connected it up yet. Is this correct? I would be very surprised if it was in any way noisy or hissy. Spend a few days getting used to all the controls and don't forget the threshold mute control. This is to mute the inter station noise when changing stations. It's in the book.

Lpspinner Says:
January 13th, 2010 at 3:05 AM

I agree. The only thing the FM3 may need is a re-alignment (my 1975 sample doesn’t even need this after nearly 35 years) and also replace the two electrolytic capacitors in the main power supply as these will be getting quite old and may be leaking their electrolyte. To my ears the FM3 is the star of the QUAD 3 series and still sounds exquisite in the context of a modern system.

Having said the above however; If you are going to use the FM3 to feed into a modern amplifier you may need to shunt the output capacitors with a 1 uf film capacitor as the original capacitors were originally intended to drive a 100K load, otherwise the FM3 may sound a little Bass shy.


Rejean lavoie Says:
December 10th, 2011 at 11:16 PM


I live in Canada and I will to know where to buy the QUAD Fm3 Tuner

Thank you

Jon barnard Says:
April 9th, 2012 at 9:46 PM

Still looking for a Quad FM3 in Canada?

Crow Says:
July 30th, 2014 at 5:57 AM

Just seconding what Lpspinner said about the polyester capacitors on the outputs. Quad amps of the time had 100K input resistance, while most have only 10K now, which causes filtering of the deep bass unless the capacitors are changed to match new amp inputs.

It's worth noting that one tuner review web site seems not to be aware of this when they state that the Quad FM3 is a fairly poor tuner. Given that it aims to do one thing: bring strong broadcast stations in with exceptional clarity and stability, it does it extremely well, and seems to be pleasing many who return to it after they find other more exotic tuners not so appealign in the long term. It's also worth nothing that the site with the distaste for the Quad FM3 mentions its contributing reviewers as having listened to a Quad FM5. Do NOT take those people too seriously, because they do not appear to realise they are deriding a tuner that doesn't even exist. People who know what they're talking about do not make mistakes as wildly silly as that one.

When I want FM DX and fast accurate tuning I'll go for a Tecsun PL-390 as likely as anything else, modern DSP IC's take cheap radios into realms previously reachable with expensive test gear! But when I want to hear a great concert or maybe record it, the FM3 is the best shot I know. It may be simple, but it never fails.

James drea Says:
February 22nd, 2015 at 6:03 PM

Im the proud owner of Fm3 the older model before S/N 5885 lately it stoped working.I hope to repair I have circuit diagram but looking for circuit description if any one out there can help I would appreciate it.


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