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-   -   Garrard 4HF Pitch control (https://www.vintage-radio.net/forum/showthread.php?t=141986)

skamanuk 6th Dec 2017 8:15 pm

Garrard 4HF Pitch control
 
Hi I have a Garrard 4HF deck but unfortunately the pitch control (I think that's what its called) isn't working the 4 speeds work fine but I can't fine adjust the speed. The small knob turns but nothing happens. Any help please. Gary

vidjoman 6th Dec 2017 8:44 pm

Re: Garrard 4HF Pitch control
 
I think they were quite stiff so maybe the knob is loose.

skamanuk 6th Dec 2017 11:20 pm

Re: Garrard 4HF Pitch control
 
All seems tight.. The knob turns and theirs weird kind of spring noise at the extreme limit of the turn in both directions??

vidjoman 7th Dec 2017 10:18 am

Re: Garrard 4HF Pitch control
 
It's a wirewound control so it would seem the wire has probably broken. Need to take it apart to find out. Probably a standard value pot can be fitted in it's place.

Edward Huggins 7th Dec 2017 11:54 am

Re: Garrard 4HF Pitch control
 
"The Classic Turntable Company" may have spares.

skamanuk 7th Dec 2017 11:40 pm

Re: Garrard 4HF Pitch control
 
Quote:

Originally Posted by vidjoman (Post 997636)
It's a wirewound control so it would seem the wire has probably broken. Need to take it apart to find out. Probably a standard value pot can be fitted in it's place.

If I can fit a standard Valve pot it would make life a lot easier..

Michael Maurice 7th Dec 2017 11:56 pm

Re: Garrard 4HF Pitch control
 
I dont think a standard pot will work, if I remember, the pot is around 20W, maybe more.

teetoon 8th Dec 2017 2:01 am

Re: Garrard 4HF Pitch control
 
1 Attachment(s)
Hello. This was discussed on Vinyl Engine and a wiring diagram posted that might be of help. The high voltage diagram is the one for UK mains.
As Michael says, it will need to be a high wattage control but not sure of the actual rating.
Hope this is of some help.

Edit: further reading shows a 25 watt OHMITE RHS10KE being a good fit if you can find one.

David.

teetoon 8th Dec 2017 2:37 am

Re: Garrard 4HF Pitch control
 
2 Attachment(s)
The pots are available on ebay but not cheap. About £30 inc post.
See images.

David.

TonyDuell 8th Dec 2017 6:05 am

Re: Garrard 4HF Pitch control
 
As a sort-of aside, I was amazed to find (while looking for something else) that RS sell 'rheostats', including the one in this thread :

https://uk.rs-online.com/web/p/rheostats/8915379/

Some of the higher power ones are _very_ expensive, and I wonder what they are used for these days.

GP49000 8th Dec 2017 8:24 am

Re: Garrard 4HF Pitch control
 
The control for a Garrard RC98 would probably work. But this isn't much help because if anything, the RC98 is uncommon; fewer were made than the 4HF.

skamanuk 9th Dec 2017 12:25 am

Re: Garrard 4HF Pitch control
 
Quote:

Originally Posted by teetoon (Post 997961)
The pots are available on ebay but not cheap. About £30 inc post.

Thank you for the help... Found and ordered

teetoon 21st Dec 2017 2:09 am

Re: Garrard 4HF Pitch control
 
Hi Skaman. Any news on this? I am interested to hear if you got it sorted as I have a couple 4HF's and the pitch control is a weak spot on these. The actual fitted controls are the sort you would find on the back of TV's.

I had my first 4HF back around 1972 and the control smoked and got replaced by a couple of wirewound resistors (by my Dad). We later discovered that the motor had shorting turns.

On my later 4HF's there is a slight burning smell if you adjust the control but it clears and the motors only get warm so I assume Garrard only meant the controls to be adjusted sparingly.

David.


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