Empathy List Archives

DR

Dan Rae

Sun, Jun 4, 2017 3:30 PM

The attached plot shows the sort of improvement in warm up time and
stability of a simple "oven" made by attaching a Darlington heater
transistor and thermistor to a Crystek 100 MHz oscillator, adjusted to
set the osc temp to around 35C and wrapping it all in foam. In this
application, a DDS clock for an HF transceiver, the result was well
worthwhile.

Dan - ac6ao

The attached plot shows the sort of improvement in warm up time and stability of a simple "oven" made by attaching a Darlington heater transistor and thermistor to a Crystek 100 MHz oscillator, adjusted to set the osc temp to around 35C and wrapping it all in foam. In this application, a DDS clock for an HF transceiver, the result was well worthwhile. Dan - ac6ao

BK

Bob kb8tq

Sun, Jun 4, 2017 3:47 PM

Hi

If you have not done so already, you might try bumping the temperature a bit to search for the
upper turn in the crystal curve. Based on the data in the plots, you do have an AT that is cut
with an upper turn.

Bob

On Jun 4, 2017, at 11:30 AM, Dan Rae danrae@verizon.net wrote:

Hi If you have not done so already, you might try bumping the temperature a bit to search for the upper turn in the crystal curve. Based on the data in the plots, you do have an AT that is cut with an upper turn. Bob > On Jun 4, 2017, at 11:30 AM, Dan Rae <danrae@verizon.net> wrote: > > <Crystek Test.doc>

R(

Richard (Rick) Karlquist

Sun, Jun 4, 2017 7:15 PM

I am trying to set up an HP 3048 system and
have read the KE5FX web page on the software.
I have successfully installed both PN3048 and
the HT Basic port of RMB. The programs basically
appear to run correctly on my Windows 7 desktop.

HOWEVER, I don't have a GP-IB card. According to
KE5FX, both the bus card and USB dongle types work.
It looks like current NI driver supports many
legacy cards. I am curious about whether this
means that all of these cards will be OK, or if I
have to buy the latest card/dongle? I would like
to be able to run both programs. The HT Basic
site says that certain bus chips are incompatible
with its software, and I should call them for suggestions.

I would appreciate hearing from anyone who can vouch
for a compatible NI card/dongle, either current production
or a legacy one. (If someone has one they want to
sell, let me know). Ideally I would like to use the
same card/dongle for both the PN3048 and the HTBasic
programs. In the PN3048 program, there is
a menu pick to select NI card of type 1 or type 2.
Does anyone know anything about that?

Rick N6RK

I am trying to set up an HP 3048 system and have read the KE5FX web page on the software. I have successfully installed both PN3048 and the HT Basic port of RMB. The programs basically appear to run correctly on my Windows 7 desktop. HOWEVER, I don't have a GP-IB card. According to KE5FX, both the bus card and USB dongle types work. It looks like current NI driver supports many legacy cards. I am curious about whether this means that all of these cards will be OK, or if I have to buy the latest card/dongle? I would like to be able to run both programs. The HT Basic site says that certain bus chips are incompatible with its software, and I should call them for suggestions. I would appreciate hearing from anyone who can vouch for a compatible NI card/dongle, either current production or a legacy one. (If someone has one they want to sell, let me know). Ideally I would like to use the same card/dongle for both the PN3048 and the HTBasic programs. In the PN3048 program, there is a menu pick to select NI card of type 1 or type 2. Does anyone know anything about that? Rick N6RK

JM

John Miles

Mon, Jun 5, 2017 2:04 AM

I'd recommend a GPIB-USB-HS adapter. There are tons of them on eBay, e.g.

http://www.ebay.com/itm/322360711342
http://www.ebay.com/itm/321957086926

These will work well with both PN3048 and HTBasic. I've purchased them from both of those sellers in the past. They appear to be genuine, unlike the counterfeit Agilent 82357Bs that are commonly sold out of China.

Re: the card selection option, PN3048 lets you choose between "Adapter 1" and "Adapter 2." This only comes into play if you have more than one NI adapter on your PC. In your case, you'll use the default Adapter 1 setting with it.

You can also use a NI PCI-GPIB board with either PN3048 or HTBasic. I'd go with the GPIB-USB-HS even though it may be a bit more expensive. It will be more future-proof than a plug-in card.

-- john, KE5FX
Miles Design LLC

HOWEVER, I don't have a GP-IB card. According to
KE5FX, both the bus card and USB dongle types work.
It looks like current NI driver supports many
legacy cards. I am curious about whether this
means that all of these cards will be OK, or if I
have to buy the latest card/dongle? I would like
to be able to run both programs. The HT Basic
site says that certain bus chips are incompatible
with its software, and I should call them for suggestions.

I'd recommend a GPIB-USB-HS adapter. There are tons of them on eBay, e.g. http://www.ebay.com/itm/322360711342 http://www.ebay.com/itm/321957086926 These will work well with both PN3048 and HTBasic. I've purchased them from both of those sellers in the past. They appear to be genuine, unlike the counterfeit Agilent 82357Bs that are commonly sold out of China. Re: the card selection option, PN3048 lets you choose between "Adapter 1" and "Adapter 2." This only comes into play if you have more than one NI adapter on your PC. In your case, you'll use the default Adapter 1 setting with it. You can also use a NI PCI-GPIB board with either PN3048 or HTBasic. I'd go with the GPIB-USB-HS even though it may be a bit more expensive. It will be more future-proof than a plug-in card. -- john, KE5FX Miles Design LLC > HOWEVER, I don't have a GP-IB card. According to > KE5FX, both the bus card and USB dongle types work. > It looks like current NI driver supports many > legacy cards. I am curious about whether this > means that all of these cards will be OK, or if I > have to buy the latest card/dongle? I would like > to be able to run both programs. The HT Basic > site says that certain bus chips are incompatible > with its software, and I should call them for suggestions. >

time-nuts@lists.febo.com

Re: [time-nuts] poor-man's oven