The Contemporary Research QCA9-33 is an active RF combiner that includes eight high-level inputs and one low-level input, combining with high isolation as well as amplifying up to a 33 dBmV output level. Designed for QMOD HDTV applications, the eight RF inputs typically receive 29 dBmV RF from QMOD HDTV modulators. The ninth input is for up to 19 dBmV RF signals, such as incoming cable feed, a control channel from an ICE-HE Head End control modulator, or any other QMOD or QCA9-33. Up to eight QCA9-33 combiners can feed a single combiner to deliver up to 76 channels. The low-noise, wideband 860 MHz amplifier compensates for combining losses and adds 3 dBmV of gain, typically supplying a total output of up to 33 dBmV. This compact unit mounts in a single rack space using CR RK1 and RK-2 rack kits (available separately), and can be mixed with QMOD HDTV modulators using the same rack kits.

QMOD HDTV modulators

ICE-HE Head End control modulator

QDA4-45 amplifier combiner

Tunes analog and digital channels in ATSC, NTSC, and clear QAM formats

Combines eight high-level channels (QMOD 29 dBmV) and one low level input (cable, ICE-HE at 10-18 dBmV)

Cascade multiple units for up to 72 channels in one array

Low-noise, 860 MHz wideband amplifier

Compensates for combining losses and adds 3 dBmV gain

Provides a maximum output level of up to 33 dBmV

Provides high-isolation combining

Operates with an extremely low noise figure of 1.8, low power of less than 2W

Compact metal enclosure, mounts in 1 RU using RK1 and RK2 rack kits (available separately)

Made in USA

Related Questions and Answers

Q: 1. Will this work with the Manfrotto 055XPROB, a photo tripod?

A: No, sorry mid-level tripod spreaders like this only work on multi-tube video tripods that have matching proprietary connections.

Q: 2. Can this replace the ground - level spreader in a MVTTWINGC?

A: A midlevel spreader provides a different type of stabilization. It can be used instead of the ground spreader on the MVTTWINGC.

Q: 3. can this clamp be placed inside another arca type clamp to rotate direction by 90 degrees?

A: Yes, this clamp has a built in Arca base.

Q: 4. What size is the Tripod Mounting Thread?

A: The mounting thread would be 3/8-16".

Q: 5. Will this work as a replacement part for a Manfrotto 351MVB2?

A: Yes

Q: 6. Will this work with a Monfrotto 536 carbon?

A: It will not. The Manfrotto 536 Carbon Fiber Video Tripod is not designed to be used with spreaders.

Q: 7. Will this work for my 525MVB tripod ?

A: That's what I have, and it was a direct replacement.

Q: 8. Will this work with the Manfrotto MVT502AM? The connection seems a little different.

A: No, this is not compatible with the MVT502AM

Q: 9. Will this work with Manfrotto 509HD?

A: No, the 509HD is a video head. I need to know which tripod is being used the following unit will only accommodate the following tripods that feature mid level spreaders.

Q: 10. Can a microphone be mounted on the tripod tube with the boom removed? What is the thread size of the tripod tube?

A: The threads on the tube of the K&M 25977 Tripod Microphone Stand with Telescoping Boom are 5/8"-27. The boom arm can be removed from the stand.