And SC crystals have a 2nd resonance about 12% higher that may dominate. It usually
must be suppressed. I would also prefer Butler or Driscoll. Oscillators that treat the crystal
as a hi-Q frequeny-dependant inductor and that need parallel capacitors to tune it to
frequency do not operate on the mechanical resonance frequency and take a hit in Q.
But. & Dris. operate on the series resonance.
regarding simulation:
I still have my License for the Radio Designer, but my connection to the full-blown
Ansoft simulator has died, literally :-(. The Radio designer should be good enough
for all linear cases; I could currently use Microwave Office on the ticket of a customer,
as I did with Agilent Design System and Genesys, (now also Agilent, or whatever
their name is this week). But as long as I don't own the license myself, my invested time
is always in danger of being lost. Don't underestimate the time it takes to master such
an environment. Maybe I'll buy Genesys one day. It cannot do all those esoteric things
but it can do everything that is important. Most of these programs have test/student
versions that should be able to simulate an oscillator.
Don't get fooled into thinking that nonlinear noise simulation is essential for you.
It isn't. You don't design microwave VCOs with bad resonators, and avoiding the
upconversion of AF noise to the carrier is easy.
regards, Gerhard
Thanks
Hi all,
I have just received an unexpected package, and firstly I was a little worry for that, because I didn't remember to have ordered anything.
With a little suspense I have opened the box.... and I have found some italian specialties. I have found a card also.
As soon as i read it, I was moved.
I would thank all of you very very much, but you did not have to do that.
I do this as an hobby, and I'm very glad to share my experiences.
Thanks all again.
The project continues.....
Andrea
Hi all,
I have just received an unexpected package, and firstly I was a little worry for that, because I didn't remember to have ordered anything.
With a little suspense I have opened the box.... and I have found some italian specialties. I have found a card also.
As soon as i read it, I was moved.
I would thank all of you very very much, but you did not have to do that.
I do this as an hobby, and I'm very glad to share my experiences.
Thanks all again.
The project continues.....
Andrea
You're welcome Andrea ...
To me there's a joy in being part of recognizing a person for having done something that has an air of being "special" to me ... So my thanks also go to you 😉
... & "in time" I look forward to "swinging" very precisely with these oscillators ... 😛
Jesper
To me there's a joy in being part of recognizing a person for having done something that has an air of being "special" to me ... So my thanks also go to you 😉
... & "in time" I look forward to "swinging" very precisely with these oscillators ... 😛
Jesper
Thanks all again.
I'm really proud of your recognition, but I do not deserve so much.
This is the copper tube, pressed by a vise, to thermally coupling the crystal with the heater PCB.
Not a simple job, and the result is not optimal.
I will ask for a quote to manufacture these items by a milling machine.
I'm really proud of your recognition, but I do not deserve so much.
This is the copper tube, pressed by a vise, to thermally coupling the crystal with the heater PCB.
Not a simple job, and the result is not optimal.
I will ask for a quote to manufacture these items by a milling machine.
Attachments
Quote from Laptech
I have just received the last quote for SC-cut crystal from Laptech.
90.3168MHz and 98.304 MHz 5th overtone
with the following parameters
C0: 3PF nominal
C1: 0.30FF nominal
ESR: <60 Ohms
Q: > 100K
LTTP: 80C to 95C
Calibration tolerance at 85C: ±4 ppm
HC43 package
15 pcs m.o.q. CAD$62.09
100 pcs CAD$39.06
lead time 8-9 weeks
Stock parts:
XT3871- 100MHz, SC3, HC43,20pF, ref temperature 85 C
1 pcs : CAD$120
5 pcs : CAD$51
10 pcs: CAD$42.60
XT3939-100MHz,SC3,HC43,20Pf, ref temperature 89 C
1 pcs: CAD$111.51
5pcs: CAD$47.39
10 pcs: CAD$39.59
No other standard parts in stock.
I have just received the last quote for SC-cut crystal from Laptech.
90.3168MHz and 98.304 MHz 5th overtone
with the following parameters
C0: 3PF nominal
C1: 0.30FF nominal
ESR: <60 Ohms
Q: > 100K
LTTP: 80C to 95C
Calibration tolerance at 85C: ±4 ppm
HC43 package
15 pcs m.o.q. CAD$62.09
100 pcs CAD$39.06
lead time 8-9 weeks
Stock parts:
XT3871- 100MHz, SC3, HC43,20pF, ref temperature 85 C
1 pcs : CAD$120
5 pcs : CAD$51
10 pcs: CAD$42.60
XT3939-100MHz,SC3,HC43,20Pf, ref temperature 89 C
1 pcs: CAD$111.51
5pcs: CAD$47.39
10 pcs: CAD$39.59
No other standard parts in stock.
Final crystal prices
Summarizing (actual exchange rate, including import duties and VAT, shipping to Italy and individual testing):
SC-cut crystal
11.2896 MHz 3rd overtone MOQ 15 pcs Eur 38.00 each
22.5792 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
24.5760 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
45.1584 MHz 5th overtone MOQ 10 pcs Eur 38.00 each
49.1520 MHz 5th overtone MOQ 10 pcs Eur 38.00 each
90.3168 MHz 5th overtone MOQ 15 pcs Eur 56.00 each
98.3040 MHz 5th overtone MOQ 15 pcs Eur 56.00 each
100 MHz (XT3939) 5th overtone MOQ 1 pcs Eur 98.00 each
100 MHz (XT3939) 5th overtone MOQ 5 pcs Eur 42.00 each
100 MHz (XT3939) 5th overtone MOQ 10 pcs Eur 35.00 each
AT-cut crystal
5.6448 MHz fundamental MOQ 15 pcs Eur 29.00 each
6.1440 MHz fundamental MOQ 15 pcs Eur 29.00 each
11.2896 MHz fundamental MOQ 10 pcs Eur 27.00 each
12.2880 MHz fundamental MOQ 10 pcs Eur 27.00 each
16.9344 MHz fundamental MOQ 10 pcs Eur 27.00 each
22.5792 MHz fundamental MOQ 10 pcs Eur 27.00 each
24.5760 MHz fundamental MOQ 10 pcs Eur 27.00 each
25.0000 MHz fundamental MOQ 10 pcs Eur 27.00 each
45.1584 MHz 3rd overtone MOQ 10 pcs Eur 27.00 each
49.1520 MHz 3rd overtone MOQ 10 pcs Eur 27.00 each
90.3168 MHz 5th overtone MOQ 15 pcs Eur 29.00 each
98.3040 MHz 5th overtone MOQ 15 pcs Eur 29.00 each
I will arrange soon a new order form, including SC-cut crystals.
As I said previously, I'm not sure SC-cut crystal will work with Clapp oscillator, due to its higher ESR.
So, if you decide to join the group buy for SC-cut crystals, you have to wait until the Butler or Driscoll oscillator are ready (unless you have already your own oscillator to get them working).
Summarizing (actual exchange rate, including import duties and VAT, shipping to Italy and individual testing):
SC-cut crystal
11.2896 MHz 3rd overtone MOQ 15 pcs Eur 38.00 each
22.5792 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
24.5760 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
45.1584 MHz 5th overtone MOQ 10 pcs Eur 38.00 each
49.1520 MHz 5th overtone MOQ 10 pcs Eur 38.00 each
90.3168 MHz 5th overtone MOQ 15 pcs Eur 56.00 each
98.3040 MHz 5th overtone MOQ 15 pcs Eur 56.00 each
100 MHz (XT3939) 5th overtone MOQ 1 pcs Eur 98.00 each
100 MHz (XT3939) 5th overtone MOQ 5 pcs Eur 42.00 each
100 MHz (XT3939) 5th overtone MOQ 10 pcs Eur 35.00 each
AT-cut crystal
5.6448 MHz fundamental MOQ 15 pcs Eur 29.00 each
6.1440 MHz fundamental MOQ 15 pcs Eur 29.00 each
11.2896 MHz fundamental MOQ 10 pcs Eur 27.00 each
12.2880 MHz fundamental MOQ 10 pcs Eur 27.00 each
16.9344 MHz fundamental MOQ 10 pcs Eur 27.00 each
22.5792 MHz fundamental MOQ 10 pcs Eur 27.00 each
24.5760 MHz fundamental MOQ 10 pcs Eur 27.00 each
25.0000 MHz fundamental MOQ 10 pcs Eur 27.00 each
45.1584 MHz 3rd overtone MOQ 10 pcs Eur 27.00 each
49.1520 MHz 3rd overtone MOQ 10 pcs Eur 27.00 each
90.3168 MHz 5th overtone MOQ 15 pcs Eur 29.00 each
98.3040 MHz 5th overtone MOQ 15 pcs Eur 29.00 each
I will arrange soon a new order form, including SC-cut crystals.
As I said previously, I'm not sure SC-cut crystal will work with Clapp oscillator, due to its higher ESR.
So, if you decide to join the group buy for SC-cut crystals, you have to wait until the Butler or Driscoll oscillator are ready (unless you have already your own oscillator to get them working).
Renewing the last interest lists
Interest List SC-cut Crystals from Laptech
- andrea_mori: 2 x 11.2896 MHz + 2 x 22.5792 MHz + 2 x 24.576 MHz + 1 x 45.1584 Mhz + 1 x 49.152 MHz
- Acko: 1 x 45.1584 MHz + 1 x 49.152MHz
- iancanada: 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- babaudio : 2 x 22.5792 MHz + 2 x 24.576 MHz
- Clsidxxl: 1 x 45.1584 MHz + 1 x 49.152MHz
- lindamar: 1 x 11.2896 MHz 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- tagheuer: 1 x 45.1584 MHz + 1 x 49.152MHz
- palmito: 1 x 45.1584 MHz + 1 x 49.152MHz
- damohpi: 1x 11.2896 Mhz (or 2x if reqd.)
- Naimster: 1 x 22.5792 MHz + 1 x 24.576 MHz
- noizas: 1 x 11.2896 MHz + 1 x 45.1584 MHz
- Phi: 1 x 22.5792 MHz + 1 x 24.576 MHz (Added title )
- stijn001: 1 x 45.1584 MHz + 1 x 49.152MHz
- ambrosia168: 3 x 11.2896 MHz + 3 x 45.1584 Mhz + 2 x 49.152 MHz
- flowerpot: 1 x 45.1584 MHz + 1 x 49.152MHz + 2 x PCB + 1 x daughter board + 2 x DIL
- jdlvfr: 2 x 11.2896 Mhz
- tods: 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- wlowes: 1 x 45.1584 MHz + 1 x 49.152MHz
- fralippo: 1 x 45.1584 MHz + 1 x 49.152MHz + PCBs
- duster1: 1 x 45.1584 MHz + 1 x 49.152MHz + PCBs
- deanoUK: 1 x 45.1584 MHz + 1 x 49.152MHz
- BDL: 1 x 22.5792 MHz
- vita : 1 x 45.1584 Mhz + 1 x 49.152 Mhz
- Malvin: 1 x 45.1584 MHz + 1 x 49.152MHz
- rlim: 1 x 22.5792MHz + 1 x 24.576MHz
- Justbes: 1 x 22.5792MHz + 1 x 24.576MHz
- Canvas: 1 x 11.2896 MHz + 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 Mhz + 1 x 49.152 MHz
- gerhard: 2 x 11.2896 MHz + 2 x 49.152MHz, also 10, 50, 100MHz (if avail., should be standard parts)
Second batch AT-cut Crystals from Laptech
- Miklos: 1 x 16.9344 MHz
- Marlowe: 3 x 16.9344Mhz + 3 x 25MHz
- carz 1x 27MHz
- 1audio : 1X6.1440MHz
- mravinsky : 2 x 16.9344Mhz + (2 x TWCMC-C XO board +1 x daughter board) if possible
- noizas : 2 x 16.9344 MHz
- randytsuch: 2x 25.0000 MHz
- casshan: 1 x 11.2896 MHz + 1 x 12.288 MHz + 2 x PCB + 1 x daughter board
- andrea_mori: 2 x 6.1440 MHz + 2 x 12.2880 MHz + 2 x 16.9344 MHz
- Fabian85: 1x 16.9344 MHz, 2x PCB + 1x daughter board
- duster1: 2 x 16.9344 MHz, 2 x PCB + 2 x daughter board
- RollE2k: 1 x 45.1584 MHz + 1 x 49.152MHz + 2x PCB + 2x daughter board
Please, add yourself to the list if you are interested.
I will publish the new order form soon, to arrange the group buy within a pair of weeks.
Interest List SC-cut Crystals from Laptech
- andrea_mori: 2 x 11.2896 MHz + 2 x 22.5792 MHz + 2 x 24.576 MHz + 1 x 45.1584 Mhz + 1 x 49.152 MHz
- Acko: 1 x 45.1584 MHz + 1 x 49.152MHz
- iancanada: 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- babaudio : 2 x 22.5792 MHz + 2 x 24.576 MHz
- Clsidxxl: 1 x 45.1584 MHz + 1 x 49.152MHz
- lindamar: 1 x 11.2896 MHz 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- tagheuer: 1 x 45.1584 MHz + 1 x 49.152MHz
- palmito: 1 x 45.1584 MHz + 1 x 49.152MHz
- damohpi: 1x 11.2896 Mhz (or 2x if reqd.)
- Naimster: 1 x 22.5792 MHz + 1 x 24.576 MHz
- noizas: 1 x 11.2896 MHz + 1 x 45.1584 MHz
- Phi: 1 x 22.5792 MHz + 1 x 24.576 MHz (Added title )
- stijn001: 1 x 45.1584 MHz + 1 x 49.152MHz
- ambrosia168: 3 x 11.2896 MHz + 3 x 45.1584 Mhz + 2 x 49.152 MHz
- flowerpot: 1 x 45.1584 MHz + 1 x 49.152MHz + 2 x PCB + 1 x daughter board + 2 x DIL
- jdlvfr: 2 x 11.2896 Mhz
- tods: 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- wlowes: 1 x 45.1584 MHz + 1 x 49.152MHz
- fralippo: 1 x 45.1584 MHz + 1 x 49.152MHz + PCBs
- duster1: 1 x 45.1584 MHz + 1 x 49.152MHz + PCBs
- deanoUK: 1 x 45.1584 MHz + 1 x 49.152MHz
- BDL: 1 x 22.5792 MHz
- vita : 1 x 45.1584 Mhz + 1 x 49.152 Mhz
- Malvin: 1 x 45.1584 MHz + 1 x 49.152MHz
- rlim: 1 x 22.5792MHz + 1 x 24.576MHz
- Justbes: 1 x 22.5792MHz + 1 x 24.576MHz
- Canvas: 1 x 11.2896 MHz + 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 Mhz + 1 x 49.152 MHz
- gerhard: 2 x 11.2896 MHz + 2 x 49.152MHz, also 10, 50, 100MHz (if avail., should be standard parts)
Second batch AT-cut Crystals from Laptech
- Miklos: 1 x 16.9344 MHz
- Marlowe: 3 x 16.9344Mhz + 3 x 25MHz
- carz 1x 27MHz
- 1audio : 1X6.1440MHz
- mravinsky : 2 x 16.9344Mhz + (2 x TWCMC-C XO board +1 x daughter board) if possible
- noizas : 2 x 16.9344 MHz
- randytsuch: 2x 25.0000 MHz
- casshan: 1 x 11.2896 MHz + 1 x 12.288 MHz + 2 x PCB + 1 x daughter board
- andrea_mori: 2 x 6.1440 MHz + 2 x 12.2880 MHz + 2 x 16.9344 MHz
- Fabian85: 1x 16.9344 MHz, 2x PCB + 1x daughter board
- duster1: 2 x 16.9344 MHz, 2 x PCB + 2 x daughter board
- RollE2k: 1 x 45.1584 MHz + 1 x 49.152MHz + 2x PCB + 2x daughter board
Please, add yourself to the list if you are interested.
I will publish the new order form soon, to arrange the group buy within a pair of weeks.
*(I've moved over to the AT batch)
Interest List SC-cut Crystals from Laptech
- andrea_mori: 2 x 11.2896 MHz + 2 x 22.5792 MHz + 2 x 24.576 MHz + 1 x 45.1584 Mhz + 1 x 49.152 MHz
- Acko: 1 x 45.1584 MHz + 1 x 49.152MHz
- iancanada: 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- babaudio : 2 x 22.5792 MHz + 2 x 24.576 MHz
- Clsidxxl: 1 x 45.1584 MHz + 1 x 49.152MHz
- lindamar: 1 x 11.2896 MHz 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- tagheuer: 1 x 45.1584 MHz + 1 x 49.152MHz
- palmito: 1 x 45.1584 MHz + 1 x 49.152MHz
- damohpi: 1x 11.2896 Mhz (or 2x if reqd.)
- Naimster: 1 x 22.5792 MHz + 1 x 24.576 MHz
- noizas: 1 x 11.2896 MHz + 1 x 45.1584 MHz
- Phi: 1 x 22.5792 MHz + 1 x 24.576 MHz (Added title )
- ambrosia168: 3 x 11.2896 MHz + 3 x 45.1584 Mhz + 2 x 49.152 MHz
- flowerpot: 1 x 45.1584 MHz + 1 x 49.152MHz + 2 x PCB + 1 x daughter board + 2 x DIL
- jdlvfr: 2 x 11.2896 Mhz
- tods: 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- wlowes: 1 x 45.1584 MHz + 1 x 49.152MHz
- fralippo: 1 x 45.1584 MHz + 1 x 49.152MHz + PCBs
- duster1: 1 x 45.1584 MHz + 1 x 49.152MHz + PCBs
- deanoUK: 1 x 45.1584 MHz + 1 x 49.152MHz
- BDL: 1 x 22.5792 MHz
- vita : 1 x 45.1584 Mhz + 1 x 49.152 Mhz
- Malvin: 1 x 45.1584 MHz + 1 x 49.152MHz
- rlim: 1 x 22.5792MHz + 1 x 24.576MHz
- Justbes: 1 x 22.5792MHz + 1 x 24.576MHz
- Canvas: 1 x 11.2896 MHz + 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 Mhz + 1 x 49.152 MHz
- gerhard: 2 x 11.2896 MHz + 2 x 49.152MHz, also 10, 50, 100MHz (if avail., should be standard parts)
Second batch AT-cut Crystals from Laptech
- Miklos: 1 x 16.9344 MHz
- Marlowe: 3 x 16.9344Mhz + 3 x 25MHz
- carz 1x 27MHz
- 1audio : 1X6.1440MHz
- mravinsky : 2 x 16.9344Mhz + (2 x TWCMC-C XO board +1 x daughter board) if possible
- noizas : 2 x 16.9344 MHz
- randytsuch: 2x 25.0000 MHz
- casshan: 1 x 11.2896 MHz + 1 x 12.288 MHz + 2 x PCB + 1 x daughter board
- andrea_mori: 2 x 6.1440 MHz + 2 x 12.2880 MHz + 2 x 16.9344 MHz
- Fabian85: 1x 16.9344 MHz, 2x PCB + 1x daughter board
- duster1: 2 x 16.9344 MHz, 2 x PCB + 2 x daughter board
- RollE2k: 1 x 45.1584 MHz + 1 x 49.152MHz + 2x PCB + 2x daughter board
- Stijn001: 1 x 45.1584 MHz, + 1 x 49.152MHz, 1x TWTMC-D&D, + 2x TWTMC-C, + 4x TWTMC-DIL
Please, add yourself to the list if you are interested.
I will publish the new order form soon, to arrange the group buy within a pair of weeks.
Interest List SC-cut Crystals from Laptech
- andrea_mori: 2 x 11.2896 MHz + 2 x 22.5792 MHz + 2 x 24.576 MHz + 1 x 45.1584 Mhz + 1 x 49.152 MHz
- Acko: 1 x 45.1584 MHz + 1 x 49.152MHz
- iancanada: 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- babaudio : 2 x 22.5792 MHz + 2 x 24.576 MHz
- Clsidxxl: 1 x 45.1584 MHz + 1 x 49.152MHz
- lindamar: 1 x 11.2896 MHz 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- tagheuer: 1 x 45.1584 MHz + 1 x 49.152MHz
- palmito: 1 x 45.1584 MHz + 1 x 49.152MHz
- damohpi: 1x 11.2896 Mhz (or 2x if reqd.)
- Naimster: 1 x 22.5792 MHz + 1 x 24.576 MHz
- noizas: 1 x 11.2896 MHz + 1 x 45.1584 MHz
- Phi: 1 x 22.5792 MHz + 1 x 24.576 MHz (Added title )
- ambrosia168: 3 x 11.2896 MHz + 3 x 45.1584 Mhz + 2 x 49.152 MHz
- flowerpot: 1 x 45.1584 MHz + 1 x 49.152MHz + 2 x PCB + 1 x daughter board + 2 x DIL
- jdlvfr: 2 x 11.2896 Mhz
- tods: 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152MHz
- wlowes: 1 x 45.1584 MHz + 1 x 49.152MHz
- fralippo: 1 x 45.1584 MHz + 1 x 49.152MHz + PCBs
- duster1: 1 x 45.1584 MHz + 1 x 49.152MHz + PCBs
- deanoUK: 1 x 45.1584 MHz + 1 x 49.152MHz
- BDL: 1 x 22.5792 MHz
- vita : 1 x 45.1584 Mhz + 1 x 49.152 Mhz
- Malvin: 1 x 45.1584 MHz + 1 x 49.152MHz
- rlim: 1 x 22.5792MHz + 1 x 24.576MHz
- Justbes: 1 x 22.5792MHz + 1 x 24.576MHz
- Canvas: 1 x 11.2896 MHz + 1 x 22.5792 MHz + 1 x 24.576 MHz + 1 x 45.1584 Mhz + 1 x 49.152 MHz
- gerhard: 2 x 11.2896 MHz + 2 x 49.152MHz, also 10, 50, 100MHz (if avail., should be standard parts)
Second batch AT-cut Crystals from Laptech
- Miklos: 1 x 16.9344 MHz
- Marlowe: 3 x 16.9344Mhz + 3 x 25MHz
- carz 1x 27MHz
- 1audio : 1X6.1440MHz
- mravinsky : 2 x 16.9344Mhz + (2 x TWCMC-C XO board +1 x daughter board) if possible
- noizas : 2 x 16.9344 MHz
- randytsuch: 2x 25.0000 MHz
- casshan: 1 x 11.2896 MHz + 1 x 12.288 MHz + 2 x PCB + 1 x daughter board
- andrea_mori: 2 x 6.1440 MHz + 2 x 12.2880 MHz + 2 x 16.9344 MHz
- Fabian85: 1x 16.9344 MHz, 2x PCB + 1x daughter board
- duster1: 2 x 16.9344 MHz, 2 x PCB + 2 x daughter board
- RollE2k: 1 x 45.1584 MHz + 1 x 49.152MHz + 2x PCB + 2x daughter board
- Stijn001: 1 x 45.1584 MHz, + 1 x 49.152MHz, 1x TWTMC-D&D, + 2x TWTMC-C, + 4x TWTMC-DIL
Please, add yourself to the list if you are interested.
I will publish the new order form soon, to arrange the group buy within a pair of weeks.
Hi Phil,
can you please reply to Hires? He is still waiting the quote for assembly service.
I did ship his items to you for assembly, but seems he has not yet received any quote.
Thanks
Andrea
can you please reply to Hires? He is still waiting the quote for assembly service.
I did ship his items to you for assembly, but seems he has not yet received any quote.
Thanks
Andrea
New Order Form
Attached the new Order Form including the SC-cut crystals.
Since I did ship all the first batch with tracking (losing money) to avoid postal issues, for the second batch I will ship at least with tracking, so shipment without tracking is not provided. I can provide shipping with insurance, if you want, at higher cost as indicated un the form.
Please, download the order form, fill it with quantities desired (yellow cells) and send it back to the e-mail address indicated in the form.
Attached the new Order Form including the SC-cut crystals.
Since I did ship all the first batch with tracking (losing money) to avoid postal issues, for the second batch I will ship at least with tracking, so shipment without tracking is not provided. I can provide shipping with insurance, if you want, at higher cost as indicated un the form.
Please, download the order form, fill it with quantities desired (yellow cells) and send it back to the e-mail address indicated in the form.
Yes, I will let you know my bank account as soon as I send you back the filled order form.
Andrea mentioned: "Maybe, for SC-cut type crystals you have to wait the Butler or the Driscoll oscillators."
I would say almost sure, due to the higher ESR of the SC-cut crystal, the transconductance of the jfet of the Clapp oscillator is too low to get it working witch SC-cut type.
On the other side there is a problem of MOQ, I cannot buy 10 or 15 pcs for each frequency for personal use, so a group buy is the only chance to start developing an oscillator using SC-cut crystal.
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