h/k 330c quick question

[JohnG]

I have a harman/kardon 330c which has FM on top and AM on the bottom in the tuning section. I'm just curious what the middle set of numbers are for, 0 to 100 by 10s. :scratch2: See example below from Oak Tree:

 

[Fletch]

I have the same unit 330c and I have never noticed those numbers until now. If I were to guess I would say they are simply used for reference but I don't know.

 

[oldgringo]

It's taken me two hours to extract this from a '.pdf' formatted HK 930 manual [duhh!] :thmbsp:

 

[JP Delaney]

That is just neat, yes neat

 

[JohnG]

It's taken me two hours to extract this from a '.pdf' formatted HK 930 manual :thmbsp:

Wow, thanks for the effort, and now I know! :thmbsp:

 

[mhardy6647]

it's just a logging scale.

 

[Brian]

Logging scales can be found on many types of radios. Had not thought about it but while they seemed to fall out of style on hi-fi tuners and receivers about the time of the AM-FM stereo tuners that preceded multiplex and required a separate am and fm tuner. They made life really easy for surfing the bands.

 

[mhardy6647]

I suspect they became fairly irrelevant for hifi as FM tuners/receivers switched to 'frequency linear' tuning caps. Much easier to interpolate on a calibrated, linear scale.

 

[Fred Longworth]

This was intended so that the "non-technical user" who didn't know the frequency ranges of the AM and FM bands could remember more easily where favorite stations were. For many people, it's easier to remember 30 than FM 94.1.

It also looks cool.

Fred

 

[garagmahal]

Interesting, I never noticed this feature before. Peaked my curiosity so I checked my receiver / tuner pile.

Ones that do:

Sansui 9090DB
Sansui 881
Kenwood KR-2120
Onkyo TX-3000
Onkyo TX-2000
Pioneer QX-8000A

Ones that don't:

Pioneer SX-850
Pioneer SX-3700
Kenwood KT-7300
Technics ST-8600
Technics ST-7300

Pretty close to even it looks like.

Learn something new everyday.

Glenn

 

[JohnG]

Yeah I have a mish-mash of late 70s/early 80s receivers and it's pretty much 50/50 with and without logging scales, although it's most prominent on the h/k. Thanks guys, I never knew about that bit of vintage history.

 

[avionic]

Real nice lookin tuna.