I placed my order with TNVC last July and received it in November. They are pretty accurate with their lead time estimates.
I spoke with Kristen at TNVC. She is well aware of the specs astronomers desire and marked my order as such. No need to demand a minimum set of specifications as that will just slow down the process.
For example, if you demand a tube with a 0.5 EBI and they receive a tube with all of your other requirements but a 0.6 EBI you'll be waiting until they receive their next shipment and hopefully they'll get a tube that meets your requirements. If not, wait until the next shipment, etc, etc,
My tube has almost identical specs as maxmir listed. My gain is 64,000 and some change.
Your tube may be a little higher or lower than what maxmir listed but it will be in the ballpark if you specify a 'astronomy graded tube' when you place your order.
Like chemisted said the numbers can change a bit up or down and you'll still have a excellent tube.
Spend the next 3 or 4 months while you wait on your tube to gather up all of the accessories you will need to make the Mod3c shine.
Filters, manual SLR lenses, adapters, reducers, ENVIS lens, TeleVue 67, etc...
I was able to purchase a NOS (new old stock) ENVIS lens on ebay. It took 3 months of diligent searching but I managed to obtain one.
P.S. I ordered the same tube as you (Mod3c, filmless white phosphor w/manual gain control)
Then you will be quite happy with a 1.3 EBI, SNR 29, 3 blem tube the dealer sends you one.
The minimums I specified are not that hard to meet. I doubt your are likely to a get a tube faster if they choose for you.
If you are going for unicorns then it could add months.
If you find an immediately available tube with slightly worse specs it may be worth the trade off.
I got my PVS14 with immediate delivery from Ben at Kosher Surplus
He had an choice of tubes. Some of the low EBI tubes had blems or 64lpr.
I ended up with very high quality tube.
Exceeded all the best specs except EBI was 0.6. I rather not take a blem.
Ben at Kosher Surplus does not do Mod3c just PVS.
Sale and service are 10/10.
If your looking at a PVS-14 call and / or email him.
Only negative is the don't offer a tube 10 year warranty on the tube.
The standard tube is warranty is from L3s at 2 years.
( I imagine it would be very rare to collect on the warranty.
Most tube damage will be from shock or leaving the unit on.
These will not be covered )
Edited by maxmir, 23 June 2021 - 11:32 AM.