Vintage RCA OP5 OP6 OP7 Collection Tube Preamps Mixers

For sale is a very rare opportunity to own a collection of beautiful vintage RCA preamps/mixers. This listing includes an OP5 mixer, OP6 mono preamp and OP7 mixer. Each of these is individually pretty difficult to come across, let alone as a collection. Overall, all units are in good cosmetic condition and all pass audio. Please note the following specifics about each item below.

OP6: Overall this unit is in nice cosmetic condition and sounds great. The electrolytic capacitors on the unit have all been replaced.

At some point in the past the power transformer was replaced for a higher power rated vintage UTC power transformer. This unit comes with an original power connector wired for 3 prong grounded power and XLR pigtails for input and output. The original front cover is included. OP7: This unit is in excellent working condition and is all original except for the volume control potentiometer on channel 4. As a result this channel sounds a bit different from channels 1-3, but overall the mixer works beautifully. This unit comes with an original power connector wired for 3 prong grounded power and XLR pigtail for output. I will include two hard to find XLR to Canon connectors for feeding the mixer input into the original larger connections in the rear. OP5: This unit is in nice cosmetic condition and fair working condition. The original unit did not have a built in PSU. It was designed to be powered by batteries or an external PSU. The previous owner (a radio station) integrated a built-in PSU and wired the audio tubes to accept 6BA6 tubes instead of the original 1609's. Currently, the unit has been largely recapped and passes audio through each of the inputs. There is an audible hum that could or could not be a problem depending on the signal you're mic'ing. If I had to guess, I would think that the PSU needs to be better shielded internally or moved outside the box. I will include two XLR to Canon connectors for feeding the mixer input into the original large connections in the rear. It will also come with typical IEC power cable. Let me know if you have any questions and check out my other vintage pro audio listings. The item "Vintage RCA OP5 OP6 OP7 Collection Tube Preamps Mixers" is in sale since Wednesday, April 11, 2018. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Vintage Pro Audio Equipment". The seller is "shimbuktu" and is located in Atlanta, Georgia. This item can be shipped to United States.