[Jukebox-list] Re: Rock Olga 1428

On 2024/07/01 7:14 p.m., Jukebox Repairman wrote:

Does this have a mute relay in the amp like a Wurlitzer?

You need to get a proper manual for your beastie!

No, there is no mute relay in the factory amplifier for the 1428. The relay found inside the amp is the heater boost for a quick warmup. The relay should energize once the 5U4 kicks the HV into gear...

John :-#)#

On Mon, Jul 1, 2024 at 8:50 PM John Robertson via Jukebox-list jukebox-list@lists.netlojix.com wrote:

On 2024/07/01 12:02 p.m., ascott822 via Jukebox-list wrote:
> Sound went out suddenly on my 1428.  The amp has been re-capped
and tubes replaced 3 years ago. Wondering if there is a mute
switch I might could check and it’s location.
>
I don't think this machine had a mute, instead it warmed up really
fast
using a higher voltage for the tube filaments until the 5U4 got warm
enough that the HV would activate the heater voltage reduction relay.

Are all the tubes glowing? A bad 5U4 will cause a total lack of sound.

Do you hear any humming from the speaker? If the speaker has a field
coil is it warm after around 1/2 hour? That will indicate that the
5U4
and it's HV is working.

John :-#)#