qertoo.blogg.se - Frame relay simplediagrams

FRAME RELAY SIMPLEDIAGRAMS PDF
FRAME RELAY SIMPLEDIAGRAMS INSTALL
FRAME RELAY SIMPLEDIAGRAMS ARCHIVE

US5MSQ: coils for PDF can be performed on almost any frames you have, and the results (basic parameters of PDF) will be almost the same with sufficiently low losses, of course it comes about correctly designed, and these are published by the main majority. Thus, if we wind a coupling coil with the number of turns 1/10 of the loop, in reality it will approximately correspond to the coefficients 1/10, 1/11 and 1/13. In these cases, for a more accurate reflection of the coupling coefficient (mutual induction), we introduce a correction factor - for the 1st case of the order of 1-1.05, the second - 1.1-1.2 and the third -1.3-1.4. They are wound, as a rule, over the middle of the contour, over the edge of the contour closer to the grounded end or, if the frame is sectional, in the section adjacent to the grounded end. Well, one more important point regarding the calculation and manufacture of communication coils.

Do not forget to smooth the sharp edges of the rings with an emery or a file before winding. We wind up evenly by laying the turns until they are completely filled - on the 2000NN 7x4x2 rings (for Tr3 and Tr4 they are glued together by 2), about 15-16 turns were obtained. I did this - I measured three identical conductors with a ruler (16cm for Tr1 and Tr2 and 24cm for Tr3 and Tr4), cleaned and tinned the ends, soldering one side in the form of a needle (with this side we will wind up in the future), clamped it in a vice and twisted it by hand to the level of about 3 twists per cm. It is important to ensure that the windings are identical in the transformer itself. You can calculate the specific number of turns for your ringlet using standard formulas, it is convenient to use the plate developed by Yu. US5MSQ:As for the winding data of transformers, it is possible to use any ferrite rings with a diameter of 7-12 mm and a permeability of 600-3000, it is important to provide an inductance for the first mixer of at least 50 μG (about 60-80) and for a detector / modulator at least 170 (). 2 Diagram of bandpass filters with an attenuator and a swinging amplifier on VT1. I will add on my own, if you observe all the voltages that are indicated on the diagram, the setup questions will disappear by themselves.įig.

FRAME RELAY SIMPLEDIAGRAMS ARCHIVE

The noise level reduced to the input is about 0.12 μV, and the sensitivity from the mixer input at s / noise \u003d 10 dB is about 0.4 μVĪGC starts to work at a level of about 4-5 μV (S5-6), while actually holding the signal up to at least 15 mV (+ 50 dB).Īnd so let's get down to the scheme itself.Īt the end of the article there will be an archive with all the schemes for downloading in full size.įig.

The total Kus from the mixer input is approximately 340-350 thousand.

The general level of intrinsic noise is about 35-45mV.

Since there is no complete description of this scheme, I will do it this way. On my own behalf, I will say that if you collect carefully, you should not have any questions, since I can earn everything at once, not counting my mistakes in installation.īelow will be clippings from posts from the forum where radio amateurs discussed this transceiver. Verified personallyīelow I will throw off the text of all the questions and answers of the author of the circuit that arose from other radio amateurs who assembled this transceiver. P.S In confidence))) At the forum, Sergey Eduardovich actively answers all questions that arise during the assembly process, for which we must pay tribute, since not all authors of their "offspring" are so actively answering especially stupid questions. But thoughts about my favorite hobby did not leave me, and I decided to assemble a transceiver for myself, but another problem arose about choosing a circuit, and then the choice fell on the "Reverse path on bipolar transistors based on the R-76" transceiver, the author of which is Sergey Eduardovich US5MSQ

FRAME RELAY SIMPLEDIAGRAMS INSTALL

The fact is that I had a long period of creative crisis, so to speak, and I did not go in for radio sports, due to moving from the countryside to the city, and I did not have the opportunity to install an antenna for at least one band, I postponed my favorite business for a long 7 years. Today we will talk about the Radio-76 transceiver, or rather about its modernization, with the permission of the author of the diagram, I will not call it that, since there is little left of the Radio-76 transceiver.