I'm "funken groovin" now.........

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skippy1969

skippy1969

Boomus Fidelis
Well I got a treat from an unnamed older fellow from Florida today...... :hoveround:
We worked a trade and I got this cool Telefunken CR100 for my trouble. :dunce:
It really sounds great and is a nice easy to carry size. :thumbsup: :stereo:
Something I found that is really weird :huh:
It says on the back panel that it is 220 volt only.
I though I would just plug it in and try it anyhow on 120 volts.
Usually when you lug in a 220 volt box into 120 volts it will play but barely.
This one must have some kind of internal switch for universal voltage as it works great and the power level lights are al lit so it is getting the power it needs to work 100%.
Anyone else seen this before? Its a new one on me for sure.

Here it is......... :thumbsup: :thumbsup:
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redbenjoe

redbenjoe

I Am Legend
told ya :-P :-) :-)
i knew you would agree that these sound gooooooood :yes:

in fact, every box i have had or heard by grundig or telefunken
looks and sounds terrific -

and thanks skippy -for yet another great//fun trade :-D :cool: :surf:
 
Fatdog

Fatdog

Well-Known Member
Staff member
Nice! But you shouldn't have mentioned the voltage thing... Ira will want it back now. :lol:
 
Gluecifer

Gluecifer

Member (SA)
Very nice Skippy!

On first look I thought it had long LED meters at the bottom of the tuner scale, and was just about to ask you how that works.
Then I realised they're not LED's but red numbers for one of the bands.

I blame having only been up for half an hour....

Lovely 'Funken though! Super classy!



Rock On.
 
Superduper

Superduper

Moderator
Staff member
skippy1969 said:
.......Usually when you lug in a 220 volt box into 120 volts it will play but barely.
This one must have some kind of internal switch for universal voltage as it works great and the power level lights are al lit so it is getting the power it needs to work 100%.
Anyone else seen this before?.................
Click to expand...

I have seen this. Normally, power transformers output more than the nomimal system voltage when on AC, as much as 20% higher. This is especially true when you see 50/60hz At 60hz, you will get higher output than the same input voltage at 50hz. So a 220 volt source that is provided 127 volts will provide approx 58% of the rated system voltage. Add 20% for normal system overage and you are going to see approx 70% of the normal system voltage at the boombox. That would be like a system run with low batteries. My Sharp GF-800 will operate Radio seemingly fine when set to 220 volts but the cassette decks looks to work fine but has no output (sound).

Just a word of caution. While the boombox might appear to operate normally, I do not recommend running it on AC like that because the low voltage can cause other issues. You will probably notice reduced radio reception and the cassette deck motors will be worked pretty hard (consume more current than necessary). That is because motors consume watts. Reducing the voltage will cause the motor to make up the difference by consuming more current. If you understand ohms law, you will immediately notice the relationship between volt/amps with regards to power (watts). High current burns out fuses, resistors, driver transistors, motor windings, etc.
 
skippy1969

skippy1969

Boomus Fidelis
Superduper said:
skippy1969 said:
.......Usually when you lug in a 220 volt box into 120 volts it will play but barely.
This one must have some kind of internal switch for universal voltage as it works great and the power level lights are al lit so it is getting the power it needs to work 100%.
Anyone else seen this before?.................
Click to expand...

I have seen this. Normally, power transformers output more than the nomimal system voltage when on AC, as much as 20% higher. This is especially true when you see 50/60hz At 60hz, you will get higher output than the same input voltage at 50hz. So a 220 volt source that is provided 127 volts will provide approx 58% of the rated system voltage. Add 20% for normal system overage and you are going to see approx 70% of the normal system voltage at the boombox. That would be like a system run with low batteries. My Sharp GF-800 will operate Radio seemingly fine when set to 220 volts but the cassette decks looks to work fine but has no output (sound).

Just a word of caution. While the boombox might appear to operate normally, I do not recommend running it on AC like that because the low voltage can cause other issues. You will probably notice reduced radio reception and the cassette deck motors will be worked pretty hard (consume more current than necessary). That is because motors consume watts. Reducing the voltage will cause the motor to make up the difference by consuming more current. If you understand ohms law, you will immediately notice the relationship between volt/amps with regards to power (watts). High current burns out fuses, resistors, driver transistors, motor windings, etc.
Click to expand...
Thanks Norm.
I wonder why I can play a tape then and crank the volume up all the way and the unit plays perfectly,no drop in performance compared to running it on batteries????? :hmmm: :huh:
If you think I shouldn't play it on ac then I'll get a 120 to 220 volt transformer then...... :cool:
 
monchito

monchito

Boomus Fidelis
well some discolights were working with 120volts when the switch was on 220volts but you could tell a lost of performance ,, because as soon as it was switched it really came back alive.. another thing is there could be a slight of a possiblity but very slight that whoever had it before could have in fact changed the transformer maybe :hmmm: :hmmm: ,, i have a hitachi 3d that is 220volt only and i did a transformer transplant but if i sold it i would have to mention it before someone tried to plug it back into 220 volts !! yikes!!!.. that (could) be a possiblity :yes: :yes: :yes:
 
redbenjoe

redbenjoe

I Am Legend
wow -- skippy --ramon might be right -- :hmmm: :hmmm:

before you start using the 220 //120 thing --
open it and check out the power supply

i had this for so long -
that i forget who had it before me :dunce: :-)
 
skippy1969

skippy1969

Boomus Fidelis
monchito said:
well some discolights were working with 120volts when the switch was on 220volts but you could tell a lost of performance ,, because as soon as it was switched it really came back alive.. another thing is there could be a slight of a possiblity but very slight that whoever had it before could have in fact changed the transformer maybe :hmmm: :hmmm: ,, i have a hitachi 3d that is 220volt only and i did a transformer transplant but if i sold it i would have to mention it before someone tried to plug it back into 220 volts !! yikes!!!.. that (could) be a possiblity :yes: :yes: :yes:
Click to expand...
Thanks for the thoughts Ramon. :smooch: :dunce:
I had it opened up all day yesterday cleaning it out and repairing the dial lamp .
I looked at the transformer and it looks stock........ :yes:
So I think I'll just hold off and use batteries and 120v once in a while.
Like I said before it seems happy as a clam running it on 120v .
No loss of performance once so ever....... :hmmm: :surf:
 
skippy1969

skippy1969

Boomus Fidelis
monchito said:
ok then you are ok then thats for incase... :-)
Click to expand...

I think I'm ok on power.
Here is the VU's the top row is radio signal strength.
The bottom row is battery power.
I have the tuner on and the tape player playing and the volume about 3/4 of the way up all at the same time to show that the power is still full up.
DSC00740.jpg
 
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