Audio output connection on V200

Hello everyone,
I have had a few requests to supply a line out connection so that when the jukebox is in use it can be connected to external amp /Sonos etc, and stream the record playing over the whole house. I have been fortunate enough that the other jukeboxes had an RCA connection already on their chassis, but I have been asked to fit one to a V200 . Now I thought I was done and dusted on this jukebox but now the owner wants a line out. I am hoping someone may point me to the ideal place to tap into on the V200 amp. Basically I am trying to take the easy way out here rather than spend more time on this machine .

Cheers
Vic

Hi Vic,
Pick it up at the volume control--connect it to either the "in" or the "out" side, depending on where the customer wants to control the external volume. Ron Rich

Thanks Ron,

I would say before the volume pot. He can control the volume at his end on the other amp.

Cheers
Vic

Vic, on this schematic: http://www.verntisdale.com/schem/hfma1-l6.jpg look toward the center and at Pin 3 of the 6SN7. This is the cathode follower output to the volume control socket (J1) @Pin 1. This is where I take a feed for most external amps in my locations and it is ahead of the volume control. If you want the volume control in the circuit (not recommended in this case) Take it from Pin 8 if the machine's internal volume control is in use, or Pin 7 if an external RVc is used.

Since this is a cathode follower it is important to check for any leakage of DC due to an old capacitor (C29) as this may damage the external device. Hopefully, this amp has been serviced.

It is also important that the external device input not be lower than 25K ohms as this will load C29 and reduce bass slightly. If it is lower I suggest using another capacitor coming from Pin 3 of 6SN7. 5 MFD would be a good choice.

Note that the output from these machines is higher than a typical source and may overload the input of the device since these sorts of consumer things don't generally have real input trimmer pots. You may have to add one externally. Use 50K or greater at the device.


Rob-NYC

Hi Rob,

Thanks for your input into this also . The Amp has been overhauled , but I think I would prefer to add another capacitor to pin 3 and add a pot for level . That way if any problems exist they can be covered. You mentioned that if the device has an input lower than 25k it will reduce bass, is this at the jukebox or external amp . I have modified the amp to get more bass , so definitely wouldn't want to lose it.
Cheers
Vic

You mentioned that if the device has an input lower than 25k it will reduce bass, is this at the jukebox or external amp .

Reduced load impedance will cause reactance in C29 -so both juke and external feed are affected. A total load (juke and external) of say, 10K-ohm will reduce bass by 2 db @ 60Hz. Many of these devices have a in input of a lot less than that. Your solution of taking the feed from a separate cap is a good choice. A 5 mfd should cover it.

As for the added pot for level; if the line is short (less than 10ft) it is Ok to add the pot at either the juke or device. If greater than that it is best to add it at the device. The reason is that if the pot is added at the source (jukebox) it now determines the source impedance feeding the line, depending on the position of the pot arm. This can make the line a lot higher in impedance and cause the line capacitance to reduce the highs. On a short line this won't really matter either way.

Rob

Hi Rob,
I tested the line out last night and it does not require a pot , which simplifies the process. No noticeable loss of bass which was also a bonus .
They say everything comes in waves , and at the moment that is present with four V200 jukebox restorations in the shop . Yet I have never worked on a V200 until this year. Plenty of KDs , Gs and Rs , AMIs and Rockola's so help was required with a few not know issues on these V200s . Thankyou and all that have contributed to solving my concerns .
Regards
Vic