M-10047 M10047 ST RF Microwave Mixer SMA 6000-15000Mhz as part of my proposed 6.7 GHz maser receiver.

Would this successfully act as replacement for 

TERRASAT Microwave 6.4 – 7.1 GHz RX RF Mixer SMA ED-0280-1 MDC6471-035 ?

https://www.ebay.co.uk/itm/205984985415?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5339129536&toolid=20006&customid=958c8a6bc681104a2b53e0377cfda14b&loc_physical_ms=42038&loc_interest_ms=&msclkid=958c8a6bc681104a2b53e0377cfda14b

To be a suitable replacement it needs to have:
RF input covering 6.4–7.1 GHz.
LO frequency compatible with your chosen local oscillator (e.g. the 5.7 GHz LO we discussed).
IF output covering the frequencies you intend to feed into the SDR (typically hundreds of MHz to around 1.5 GHz).
Passive or active mixer type appropriate for your gain budget.
SMA connectors (or adapters if not).

Any listing is simply a generic 1.5–4.5 GHz or 5–4200 MHz mixer, then it is not a replacement because it won’t operate at 6.7 GHz.

The M-10047 M10047 ST RF Microwave Mixer SMA 6000-15000Mhz is likely to work as a replacement for the Terrasat mixer, and in some respects it may actually be the better choice because it covers your 6.7 GHz methanol maser frequency comfortably.

For your proposed receiver using a 5.7 GHz local oscillator:

• RF: 6.4–7.1 GHz (includes the 6.668519 GHz methanol line) ✔️
• LO: 5.7 GHz ✔️
• IF: 6.6685 − 5.700 ≈ 968.5 MHz, which is ideal for an RTL-SDR or SDRplay. ✔️

The only things you should verify before buying are:

• It is a double-balanced passive mixer.
• It requires the expected LO drive level (typically +7 to +13 dBm).
• The IF port extends down to at least 1 GHz (or DC to several GHz).

Assuming those to be true, it is likely that the M-10047 could work in my 6.7 GHz maser receiver. It should be an entirely suitable replacement for the Terrasat mixer.