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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment.

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Old 1st Oct 2020, 8:50 pm   #1
ChrisChilton
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Default Rank Arena 2000GT with a B55

I picked this up today and itís ****** marvellous...apart from the fact that the sound is really crackly and low volume through one of the ports but the other is a cracker!

Should I try a little contact cleaner initially?
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Old 1st Oct 2020, 9:03 pm   #2
Radio Wrangler
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Default Re: Rank Arena 2000GT with a B55

And a Lenco turntable unit by the looks.

Try switch cleaner in the pots to start with. Operate all the switches and buttons several times as well. It's got a bit of neglect to catch up on.

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Old 1st Oct 2020, 9:41 pm   #3
ChrisChilton
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Default Re: Rank Arena 2000GT with a B55

It’s a Lenco B55 and only cost me £20.
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Old 1st Oct 2020, 10:31 pm   #4
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Default Re: Rank Arena 2000GT with a B55

It is quite likely that the low volume problem will be with the blue Philips electrolytic coupling and emitter bypass capacitors in the amplifier having low capacitance. It is a well-known fault with this model. I think they are 100uF.

Ron
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Old 1st Oct 2020, 10:33 pm   #5
ChrisChilton
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Default Re: Rank Arena 2000GT with a B55

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Originally Posted by ronbryan View Post
It is quite likely that the low volume problem will be with the blue Philips electrolytic coupling capacitors in the amplifier having low capacitance. It is a well-known fault with this model. I think they are 100uF.

Ron
Itís just in the one port though.

I was really hoping to not have to take this one apart.
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Old 1st Oct 2020, 10:39 pm   #6
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Default Re: Rank Arena 2000GT with a B55

I agree that it's likely to be a component fault on one of these. I did an Arena amplifier a while ago and from memory I had to replace two electrolytic capacitors and the bad crackle was caused by a solder joint that looked like it hadn't been soldered properly from new - took some finding!
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Old 1st Oct 2020, 10:44 pm   #7
ChrisChilton
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Default Re: Rank Arena 2000GT with a B55

How easy was it to get into?

It works well Mono. ��
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Old 1st Oct 2020, 10:46 pm   #8
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Default Re: Rank Arena 2000GT with a B55

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How easy was it to get into?
It was the separate amplifier version, not the one with the deck.
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Old 2nd Oct 2020, 8:24 am   #9
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Default Re: Rank Arena 2000GT with a B55

Correction to my post #4 - The coupling capacitors in the AF amplifier are 10uF, the emitter bypass caps are 100uF.

The manual is quite helpful as it gives details of several test parameters for each channel - e.g. insert 120mV rms 1kHz sinewave into the tape input, measure 6.9V rms across 3.2 ohm load applied to speaker outputs. You can do this test initially without dismantling.

Ron
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Old 2nd Oct 2020, 8:29 am   #10
ChrisChilton
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Default Re: Rank Arena 2000GT with a B55

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Originally Posted by ronbryan View Post
Correction to my post #4 - The coupling capacitors in the AF amplifier are 10uF, the emitter bypass caps are 100uF.

The manual is quite helpful as it gives details of several test parameters for each channel - e.g. insert 120mV rms 1kHz sinewave into the tape input, measure 6.9V rms across 3.2 ohm load applied to speaker outputs. You can do this test initially without dismantling.

Ron
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Thanks, now please talk to me like Iím an idiot.
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Old 2nd Oct 2020, 8:35 am   #11
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Default Re: Rank Arena 2000GT with a B55

I've attached an extract from the manual (post #9) showing the audio printed circuit board. Probably you should try to see if a local Forum member can help you fix it, unless you make trips to Guildford.

Ron
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Old 2nd Oct 2020, 8:40 am   #12
ChrisChilton
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Default Re: Rank Arena 2000GT with a B55

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Originally Posted by ronbryan View Post
I've attached an extract from the manual (post #9) showing the audio printed circuit board. Probably you should try to see if a local Forum member can help you fix it, unless you make trips to Guildford.

Ron
Thanks Ron, sadly I don’t live closer to you.
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Old 2nd Oct 2020, 2:43 pm   #13
Edward Huggins
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Default Re: Rank Arena 2000GT with a B55

This is really worth fixing. You've got it almost for free anyway, and if you're not confident to tackle this, why not ask a West Midlands Member to assist. And wherein you will not get ripped off. I'm aware of the Lockdown issues, but it may well be worth your wait. This will give a super sound when matched to efficient speakers.
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Old 2nd Oct 2020, 4:09 pm   #14
ChrisChilton
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Default Re: Rank Arena 2000GT with a B55

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Originally Posted by Edward Huggins View Post
This is really worth fixing. You've got it almost for free anyway, and if you're not confident to tackle this, why not get a West Midlands Member to assist. And wherein you will not get ripped off. I'm aware of the Lockdown issues, but it may well be worth your wait. This will give a super sound when matched to efficient speakers.
Thanks Edward, is there an easy way to find people who are willing to help locally on this forum?
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Old 2nd Oct 2020, 4:15 pm   #15
Edward Huggins
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Default Re: Rank Arena 2000GT with a B55

Yes, it's easy. Just Post in "Repair and Restoration Services Wanted" from the Landing Page above on this Site.
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Old 2nd Oct 2020, 9:24 pm   #16
ChrisChilton
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Default Re: Rank Arena 2000GT with a B55

Happy to try myself if it’s doable but I’ve also posted to the other section.
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Old 3rd Oct 2020, 9:22 pm   #17
ChrisChilton
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Default Re: Rank Arena 2000GT with a B55

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Originally Posted by ronbryan View Post
I've attached an extract from the manual (post #9) showing the audio printed circuit board. Probably you should try to see if a local Forum member can help you fix it, unless you make trips to Guildford.

Ron
Iím going to have a proper look at it tomorrow, I havenít had chance to yet but I do know that itís fairly decent with only one speaker so it could be great.
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Old 4th Oct 2020, 8:32 pm   #18
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Default Re: Rank Arena 2000GT with a B55

Yes, it’s definitely an issue with one of the channels, it’s a real shame because the one that works sounds great.
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