Revox PR99...plays...but no record!!? - UK Vintage Radio Repair and Restoration Discussion Forum

tonewheelkev · 27th Nov 2021, 3:03 pm

A couple of observations here!

With mic input selected...signal creates bounce at VU meter...so a good sign.
Using Line-in...via XLR...no such luck....no bounce at meters.
(Signal IS getting to the Line Input PCB)

Attempting to 'record' via mikes....appears to work (LEDs lit).....but replay show that previous recording hasn't been erased.

Michael Maurice · 28th Nov 2021, 1:32 pm

it looks like the Bias Oscillator has failed.

tonewheelkev · 28th Nov 2021, 3:08 pm

Went back inside....found a molex type connector(between sync amp pcb and oscillator pcb) that I'd managed to leave dis-connected....

All back together now...and have recording...both from Line In and Mic...so far only tried 7.5ips

Now noticing that record level controls aren't having desired effect...they do nothing, and it's as if the level was fixed!
Also...Output level dual conc. pot does nothing too....Hhhmmnnn!!!

Starting to wonder if I need to read the operational manual here....old fashioned though that has now become!!!

Ted Kendall · 28th Nov 2021, 3:16 pm

Cal switches?

tonewheelkev · 28th Nov 2021, 3:20 pm

Quote:

Originally Posted by Ted Kendall

Cal switches?

Both latch successfully....although I've had to remove the closing fisheye bits from one of them...as they were broken, and jamming the switch!!

.....BINGO....I'm an Idiot....UNCAL switches both depressed....now have control....THANKS!!!!

Ted Kendall · 28th Nov 2021, 8:12 pm

We've all been there...

tonewheelkev · 28th Nov 2021, 9:29 pm

Quote:

Originally Posted by Ted Kendall

We've all been there...

.....but I keep on goin' back!!!

27th Nov 2021, 3:03 pm	#1
tonewheelkev Pentode Join Date: Feb 2010 Location: Leeds, West Yorkshire, UK. Posts: 121	Revox PR99...plays...but no record!!? A couple of observations here! With mic input selected...signal creates bounce at VU meter...so a good sign. Using Line-in...via XLR...no such luck....no bounce at meters. (Signal IS getting to the Line Input PCB) Attempting to 'record' via mikes....appears to work (LEDs lit).....but replay show that previous recording hasn't been erased.

28th Nov 2021, 1:32 pm	#2
Michael Maurice Moderator Join Date: Feb 2006 Location: Wembley, Middlesex Posts: 7,225	Re: Revox PR99...plays...but no record!!? it looks like the Bias Oscillator has failed. __________________ Forum Moderator http://www.michaelmauricerepairs.co.uk/

28th Nov 2021, 3:08 pm	#3
tonewheelkev Pentode Join Date: Feb 2010 Location: Leeds, West Yorkshire, UK. Posts: 121	Re: Revox PR99...plays...but no record!!? Went back inside....found a molex type connector(between sync amp pcb and oscillator pcb) that I'd managed to leave dis-connected.... All back together now...and have recording...both from Line In and Mic...so far only tried 7.5ips Now noticing that record level controls aren't having desired effect...they do nothing, and it's as if the level was fixed! Also...Output level dual conc. pot does nothing too....Hhhmmnnn!!! Starting to wonder if I need to read the operational manual here....old fashioned though that has now become!!! Last edited by tonewheelkev; 28th Nov 2021 at 3:14 pm.

28th Nov 2021, 3:16 pm	#4
Ted Kendall Dekatron Join Date: Jul 2008 Location: Kington, Herefordshire, UK. Posts: 3,675	Re: Revox PR99...plays...but no record!!? Cal switches?

28th Nov 2021, 8:12 pm	#6
Ted Kendall Dekatron Join Date: Jul 2008 Location: Kington, Herefordshire, UK. Posts: 3,675	Re: Revox PR99...plays...but no record!!? We've all been there...